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JEE Continuity and Differentiability PYQs with Solutions

576 previous year questions from Continuity and Differentiability (JEE Main & Advanced Mathematics) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

576 questionsMathematics2002–2026Answers + solutions

About Continuity and Differentiability PYQs

Continuity and Differentiability has 576 previous year questions in the Quantrex Academy JEE Main & Advanced Mathematics bank. The 220 questions in this list come from JEE Main (154), NTA Abhyas JEE Main (44) and JEE Advanced (22), spanning 2002 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2026: 16
  • 2025: 9
  • 2024: 17
  • 2023: 12
  • 2022: 18
  • 2021: 28
  • 2020: 59
  • 2019: 14
  • 2018: 6
  • 2017: 2
  • 2016: 5
  • 2015: 3

Continuity and Differentiability questions with solutions

1

Let ℝ denote the set of all real numbers. Let f : ℝ arrow ℝ be an arbitrary function and let g : ℝ arrow ℝ be the function defined by g(x) = x f(x) , for all x ∈ ℝ . Then which of

JEE Advanced 2026 Solution
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2

Consider the function f : (-(π)/(2), (π)/(2)) arrow (-∞, ∞) defined by f(x) = (|x| + |x - 1|) x + [x x] , where [x x] is the greatest integer less than or equal to x x . Let α be

JEE Advanced 2026 Solution
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3

For a real number α , let [α] denote the greatest integer less than or equal to α . For a finite set S , let |S| denote the number of elements in the set S . Consider the

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4

For the function f(x) = e^ |x| - |x| , x ∈ ℝ , consider the following statements: Statement I: f is differentiable for all x ∈ ℝ . Statement II: f is increasing in (-π, -(π)/(2))

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5

Let f(x) = cases (1)/(3), & x ≤ π/2 (b(1- x))/((π-2x)^2), & x > π/2 cases . If f is continuous at x=π/2 , then the value of ∫_ 0 ^ 3b-6 |x^2+2x-3|\,dx is:

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6

Let f(x) = cases x^3 + 8 ; & x Then the number of points, where the function g ∘ f is discontinuous, is __________.

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7

Let f(x)= cases e^ x-1 , & x<0 x^2-5x+6, & x ≥ 0 cases and g(x)=f(|x|)+|f(x)| . If the number of points where g is not continuous and is not differentiable are α and β

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8

The number of points, at which the function f(x) = \ 6x, 2 + 3x^2\ + |x - 1|| |x^2 - (1)/(4)|| , x ∈ (-π, π) , is not differentiable, is _____.

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9

The number of points in the interval [2, 4] , at which the function f(x) = [x^2 - x - (1)/(2)] , where [·] denotes the greatest integer function, is discontinuous, is _______.

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10

Let f(x)= _ θ arrow 0 ( π x-x^ ((2)/(θ)) (x-1) 1+x^ ((2)/(θ)) (x-1) ), x ∈ R . Consider the following two statements : (I) f(x) is discontinous at x=1 . (II) f(x) is continous at

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11

Let [t] denote the greatest integer less than or equal to t . If the function f(x)=\ array cl b^ 2 ((π)/(2)[(π)/(2)( x+ x) x]), & x 0 a &, x=0 array . is continuous at x=0 , then

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12

If the function f(x)= e^ x (e^ x-x -1)+ _ e ( x+ x)-x x-x is continuous at x=0 , then the value of f(0) is equal to

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13

Let α, β ∈ ℝ be such that the function f(x)= cases 2 α(x^ 2 -2)+2 β x &, x be differentiable at all x ∈ ℝ . Then 34(α+β) is equal to

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14

If f(x)=\ array cc a|x|+x^ 2 -2( |x|)( |x|) x &, x ≠ 0 b &, x=0 array . is continuous at x=0 , then a+b is equal to

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15

Let f(x)= cases a x^ 2 +2 a x+3 4 x^ 2 +4 x-3 &, x ≠-(3)/(2), (1)/(2) ~b &, x=-(3)/(2), (1)/(2) cases be continuous at x=-(3)/(2) . If f ∘ f(x)=(7)/(5) , then x is equal to:

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16

Let [·] denote the greatest integer function, and let f(x)= \ 2 x, x^ 2 \ . Let S = \ x ∈(-2,2). : the function g (x)=|x| [x^ 2 ] is discontinuous at .x\ . Then ∑_ x ∈ S f(x)

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17

The number of points of discontinuity of the function f(x)=[ x^2 2 ]-[ x ], x ∈[0,4] , where [·] denotes the greatest integer function is ________

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18

Let m and n be the number of points at which the function f(x)= \ x, x^3, x^5, … ., x^ 21 \ , x ∈ ℝ , is not differentiable and not continuous, respectively. Then m+n is equal to

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19

Let f(x)= cases (1+ax)^ 1 / x & , x 0 1+b & , x=0 (x+4)^ 1 / 2 -2 (x+c)^ 1 / 3 -2 & , cases be continuous at x=0 . Then e^a b c is equal to

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20

Let the function f(x)=(x^2+1)|x^2-a x+2|+ |x| be not differentiable at the two points x=α=2 and x=β . Then the distance of the point (α, β) from the line 12 x+5 y+10=0 is equal to

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21

Let f(x)=\ array lc 3 x, & x 0 \ 1+x+[x], x+2[x]\ , & 0 ≤ x ≤ 2 5, & x 2, array . where [.] denotes greatest integer function. If α and β are the number of points, where f is not

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22

Let [x] denote the greatest integer function, and let m and n respectively be the numbers of the points, where the function f(x)=[x]+|x-2|,-2 x 3 , is not continuous and not

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23

If the function f(x)=\ array l (2)/(x)\ (k_1+1) x+ (k_2-1) x\ , x 0 4, x=0 (2)/(x) _e((2+k_1 x)/(2+k_2 x)), x 0 array . is continuous at x=0 , then k_1^2+k_2^2 is equal to

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24

Let f(x) be a real differentiable function such that f(0)=1 and f(x+y)=f(x) f^ (y)+f^ (x) f(y) for all x, y ∈ R . Then ∑_ n=1 ^ 100 _ e f(n) is equal to :

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25

Let the function, f(x)= cases -3 a x^2-2, & x 1 a^2+b x, & x 1 cases be differentiable for all x ∈ R , where a 1, b ∈ R . If the area of the region enclosed by y=f(x) and the line

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26

Let f:(0, π) arrow R be a function given by f(x)= \(\ array cc ((8)/(7))^ ( 8 x)/( 7 x) , & 0 where a, b ∈ Z . If f is continuous at x=(π)/(2) , then a^2+b^2 is equal to

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27

For a, b>0 , let f(x)=\ array cc ((a+1) x)+b x x , & x 0 array . be a continous function at x=0 . Then b a is equal to :

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28

Let [t] denote the greatest integer less than or equal to t . Let f:[0, ∞) arrow R be a function defined by f(x)=[(x)/(2)+3]-[ x ] . Let S be the set of all points in the interval

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29

Let f:[-1,2] arrow R be given by f(x)=2 x^2+x+[x^2]-[x] , where [t] denotes the greatest integer less than or equal to t . The number of points, where f is not continuous, is :

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30

If the function f(x)=( 3 x+α x-β 3 x)/(x^3), x ∈ R , is continuous at x=0 , then f(0) is equal to :

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31

If the function f(x)= cases 72^x-9^x-8^x+1 2 - 1+ x , & x ≠ 0 a _e 2 _e 3 & , x=0 cases is continuous at x=0 , then the value of a^2 is equal to

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32

Let f: R arrow R be a function given by f(x)=\ array ll (1- 2 x)/(x^2), & x 0 array . where α, β ∈ R . If f is continuous at x=0 , then α^2+β^2 is equal to :

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33

Let f(x) = |2 x ^ 2 + 5|x| - 3|, x ∈ R . If m and n denote the number of points where f is not continuous and not differentiable respectively, then m + n is equal to:

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34

Let f: R → R be defined as f(x) = \ array ll a - bcos2x x ^ 2 ; x < 0 x ^ 2 + cx + 2; 0 ≤ x ≤ 1 2x + 1; x > 1 array ) If f is continuous everywhere in R and m is the number of

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35

Consider the function f: (0, ∞) → R defined by f(x) = e ^ - | _ e x| . If m and n be respectively the number of points at which f is not continuous and f is not differentiable

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36

Let g(x) be a linear function and f(x) = \ cases g(x), & x ≤ 0 ((1 + x)/(2 + x))(1)/(x), & x > 0 cases ), is continuous at x = 0 . If f ^ ' (1) = f(- 1) , then the value of g(3) is

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37

Let a and b be real constants such that the function f defined by f(x) = \ cases x ^ 2 + 3x + a, & x ≤ 1 bx + 2, & x > 1 cases ) be differentiable on R . Then, the value of ∫ _

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38

Let f: R - 0 → R be a function satisfying f((x)/(y)) = (f ( x ))/(f ( y )) for all x, y, f ( y ) ≠ 0 . If f ^ ' ( 1 ) = 2024 , then

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39

If the function f(x) = \ cases (1)/(| x |), & | x | ≥ 2 a x ^ 2 + 2b, & | x | < 2 cases ) is differentiable on R , then 48 ( a + b ) is equal to _______.

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40

Let f(x) = _ r → x \ 2 r ^ 2 [( f ( r ) ) ^ 2 - f ( x ) f ( r )] r ^ 2 - x ^ 2 - r ^ 3 e(f ( r ))/(r)\ be differentiable in ( - ∞ , 0 ) ∪ ( 0, ∞ ) and f ( 1 ) = 1 . Then the value

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41

Consider the function f: ( 0, 2 ) → R defined by f ( x ) = (x)/(2) + (2)/(x) and the function g ( x ) defined by g(x) = \ cases min f ( t ) , & 0 < t ≤ xand0 < x ≤ 1 (3)/(2) + x

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42

Consider the function f(x) = \ cases a(7x - 12 - x ^ 2 ) b| x ^ 2 - 7x + 12| & , x < 3 2(sin ( x - 3 ))/(x - [ x ]) & , x > 3 b & , x = 3 cases ),where [ x ] denotes the greatest

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43

Let f: (0, 1) → ℝ be the function defined as f(x) = [4x] (x - (1)/(4)) ^ 2 (x - (1)/(2)) , where [ x ] denotes the greatest integer less than or equal to x . Then which of the

JEE Advanced 2023 Solution
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44

Let [x] denote the greatest integer function and f(x) = max\ 1 + x + [x], 2 + x, x + 2[x]\ , 0 ≤ x ≤ 2 , where f is not continuous and n be the number of points in (0, 2) , where

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45

Let [x] be the greatest integer ≤ x . Then the number of points in the interval ( – 2, 1 ) where the function f(x) = |[x]| + x - [x] is discontinuous, is _____.

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46

Let f and g be two functions defined by f(x) = \ array ll x + 1, x < 0 |x - 1| , x ≥ 0 array and g(x) = \ array ll x + 1, x < 0 1, x ≥ 0 array .Then (gof) (x) is

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47

Let f(x) = [ x ^ 2 - x] + |- x + [x]| , where x ∈ ℝ and [t] denotes the greatest integer less than or equal to t . Then, f is

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48

Let f: (- 2, 2) → ℝ be defined by f(x) = \ cases x[x] & , & - 2 < x < 0 (x - 1)[x] & , & 0 ≤ x < 2 cases ) where [x] denotes the greatest integer function. If m and n respectively

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49

Let k and m be positive real numbers such that the function f(x) = \ cases 3 x ^ 2 + k x + 1 , & 0 0 . Then 8 f ^ ' ( 8 ) f ^ ' ((1)/(8)) is equal to

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50

Let a ∈ ℤ and [t] be the greatest integer ≤ t , then the number of points, where the function f(x) = [a + 13sinx], x ∈ (0, π) is not differentiable, is ____________

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51

Let f and g be twice differentiable functions on R such that f ^ " (x) = g ^ " (x) + 6x f ^ ' (1) = 4 g ^ ' (1) - 3 = 9 f(2) = 3g(2) = 12 Then which of the following is NOT true ?

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52

Suppose f is a function satisfying f ( x + y ) = f ( x ) + f ( y ) for all x, y ∈ ℕ and f ( 1 ) = (1)/(5) . If ∑ _ n = 1 ^ m (f ( n ))/(n ( n + 1 ) ( n + 2 )) = (1)/(12) then m is

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53

If the function f(x) = \ cases (1 + | cosx |)(λ)/(| cosx |), & 0

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54

Let f(x) = \ array ll x ^ 2 sin((1)/(x)); x ≠ 0 0; x = 0 array ), then at x = 0

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55

Let the function f(x) = \ cases _ e (1 + 5x) - _ e (1 + ) x & ifx ≠ 0 10 & ifx = 0 cases ) be continuous at x = 0 . Then α is equal to

JEE Main 2022 Solution
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56

If [t] denotes the greatest integer ≤ t , then number of points, at which the function f(x) = 4|2x + 3| + 9[x + (1)/(2)] - 12[x + 20] is not differentiable in the open interval (

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57

The number of points, where the function f: R → R, f(x) = |x - 1|cos|x - 2|sin|x - 1| + (x - 3)| x ^ 2 - 5x + 4| , is NOT differentiable, is

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58

The function f: R → R defined by f(x) = _ n → ∞ cos(2 ) - x ^ 2n sin(x - 1) 1 + x ^ 2n + 1 - x ^ 2n is continuous for all x in

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59

If for p ≠ q ≠ 0 , then function f(x) = (p(729 + x)7 - 3)/(729 + qx3 - 9) is continuous at x = 0 , then

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60

Let f(x) = 2 + |x| - |x - 1| + |x + 1|, x ∈ R . Consider (S1): f ^ ' (- (3)/(2)) + f ^ ' (- (1)/(2)) + f ^ ' ((1)/(2)) + f ^ ' ((3)/(2)) = 2 (S2): ∫ _ - 2 ^ 2 f(x)dx = 12 Then,

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61

Let a function f: ℝ → ℝ be defined as: f(x) = \ cases ∫ _ 0 ^ x (5 - |t - 3|)dt, & x > 4 x ^ 2 + bx, & x ≤ 4 cases ) where b ∈ ℝ . If f is continuous at x = 4 , then which of the

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62

If the function f(x) = \ cases _ e (1 - x + x ^ 2 ) + _ e (1 + x + x ^ 2 ) secx - cosx , & x ∈ ((- π)/(2), (π)/(2)) - \ 0\ k & , x = 0 cases ) is continuous at x = 0 , then k is

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63

If f(x) = \ cases x + a, & x ≤ 0 |x - 4|, & x > 0 cases ) and g(x) = \ cases x + 1, & x < 0 (x - 4) ^ 2 + b, & x ≥ 0 cases ) are continuous on R , then (gof)(2) + (fog)(- 2) is

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64

Let f(x) = \ cases |4 x ^ 2 - 8x + 5|, & if8 x ^ 2 - 6x + 1 ≥ 0 [4 x ^ 2 - 8x + 5], & if8 x ^ 2 - 6x + 1 < 0 cases ), where [α] denotes the greatest integer less than or equal to

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65

Let f: R → R be a function defined by : f(x) = \ cases max _ t ≤ x \ t ^ 3 - 3t\ ; & x ≤ 2 x ^ 2 + 2x - 6; & 2 5 cases ) Where [t] is the greatest integer less than or equal to t

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66

Let f, g: R → R be functions defined by f(x) = \ cases [x] & , x g(x) = \ cases e ^ x - x, & x where [x] denote the greatest integer less than or equal to x . Then, the function

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67

Let f: ℝ → ℝ be defined as f(x) = [ cases [ e ^ x ], & x where a, b, c ∈ ℝ and [t] denotes greatest integer less than or equal to t . Then, which of the following statements is

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68

Let f(x) = min\ 1, 1 + xsinx\ , 0 ≤ x ≤ 2π . If m is the number of points, where f is not differentiable and n is the number of points, where f is not continuous, then the ordered

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69

f, g: R → R be two real valued function defined as f(x) = \ cases - |x + 3| & , & x < 0 e ^ x & , & x ≥ 0 cases ) and g(x) = \ cases x ^ 2 + k _ 1 x & , & x < 0 4x + k _ 2 & , & x

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70

Let f(x) = [2 x ^ 2 + 1] and g(x) = \ cases 2x - 3, & x < 0 2x + 3, & x ≥ 0 cases ), where [t] is the greatest integer ≤ t . Then, in the open interval (- 1, 1) , the number of

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71

Let f(x) = \ cases (sin(x - [x]))/(x - [x]), & x ∈ (- 2, - 1) max(2x, 3[|x|]), & |x| where [t] denotes greatest integer ≤ t . If m is the number of points where f is not

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72

The number of points where the function f(x) = \ cases |2 x ^ 2 - 3x - 7| & ifx ⩽ - 1 [4 x ^ 2 - 1] & if - 1 < x < 1 |x + 1| + |x - 2| & ifx ⩾ 1 cases ), where [t] denotes the

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73

Let [ t ] denote the greatest integer ≤ t . The number of points where the function f ( x ) = [ x ] | x ^ 2 - 1| + sin((π)/([ x ] + 3)) - [ x + 1 ] , x ∈ ( - 2, 2 ) is not

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74

The function f(x) = | x ^ 2 - 2x - 3| · e ^ 9 x ^ 2 - 12x + 4 is not differentiable at exactly :

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75

If the function f(x) = \ array ll (1)/(x) _ e ((1 + (x)/(a))/(1 - (x)/(b))), x 0 array ) is continuous at x = 0, then (1)/(a) + (1)/(b) + (4)/(k) is equal to :

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76

Let [ t ] denote the greatest integer less than or equal to t . Let f ( x ) = x - [ x ] , g ( x ) = 1 - x + [ x ] , and h ( x ) = min f ( x ) , g ( x ) , x ∈ [ - 2, 2 ] . Then h

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77

Let a, b ∈ R, b ≠ 0 . Defined a function, f(x) = \ array ll asin(π)/(2) ( x - 1 ) ,forx ≤ 0 tan2x - sin2x b x ^ 3 , forx > 0 array ) If f is continuous at x = 0 , then 10 - ab is

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78

Let f: [0, ∞) → [0, 3] be a function defined by f(x) = \ array ll max\ sint: 0 ≤ t ≤ π\ , x ∈ [0, π] 2 + cosx, x > π array ). Then which of the following is true ?

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79

Let f: (- (π)/(4), (π)/(4)) → R be defined as, f(x) = \ cases (1 + |sinx|)(3a)/(|sinx|) & , - (π)/(4) If f is continuous at x = 0 then the value of 6a + b ^ 2 is equal to:

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80

Let f: [0, 3] → R be defined by f(x) = min\ x - [x], 1 + [x] - x\ where [x] is the greatest integer less than or equal to x . Let P denote the set containing all x ∈ [0, 3] where

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81

If f(x) = \ cases ∫ _ 0 ^ x (5 + |1 - t|)dt, & x > 2 5x + 1, & x ≤ 2 cases , then

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82

Consider the function f(x) = (P(x))/(sin(x - 2)), x ≠ 2 , and f(x) = 7, x = 2 where P(x) is a polynomial such that P ^ " (x) is always a constant and P(3) = 9 . If f(x) is

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83

Let f: R → R be defined as f(x) = \ cases λ| x ^ 2 - 5x + 6| μ(5x - x ^ 2 - 6) & x 2 μ & x = 2 cases ) where [x] is the greatest integer less than or equal to x . If f is

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84

Let f: [ 0, ∞ ) → [ 0, ∞ ) be defined as f(x) = ∫ _ 0 ^ x [y]dy where [ x ] is the greatest integer less than or equal to x . Which of the following is true?

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85

Let f: R → R be defined as f(x) = \ cases x ^ 3 ( 1 - cos2x ) ^ 2 _ e ( 1 + 2x e ^ - 2x (1 - x e ^ - x ) ^ 2 ) & , x ≠ 0 α & , x = 0 cases ) If f is continuous at x = 0, then α is

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86

Let f: R → R be a function defined as f(x) = \ cases 3(1 - (| x |)/(2)) & if & | x | ≤ 2 0 & if & | x | > 2 cases . Let g: R → R be given by g ( x ) = f ( x + 2 ) - f ( x - 2 ) .

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87

Let a function g: [0, 4] → R be defined as g(x) = \ cases max\ t ^ 3 - 6 t ^ 2 + 9t - 3\ _ 0 ≤ t ≤ x , & 0 ≤ x ≤ 3 4 - x, & 3 then the number of points in the interval (0, 4)

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88

Let a function f: R → R be defined as, f(x) = \ cases sinx - e ^ x & ifx ≤ 0 a + [- x] & if0 Where [x] is the greatest integer less than or equal to x . If f is continuous on R

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89

Let f: R → R be a function defined as f(x) = \ cases (sin ( a + 1 ) x + sin2x)/(2x) & , if x 0 cases ) If f is continuous at x = 0 , then the value of a + b is equal to :

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90

Let f: R → R satisfy the equation f ( x + y ) = f ( x ) · f ( y ) for all x, y ∈ R and f ( x ) ≠ 0 for any x ∈ R . If the function f is differentiable at x = 0 and f ^ ' ( 0 ) = 3

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91

If f(x) = \ cases (1)/(| x |) & ; & | x | ≥ 1 a x ^ 2 + b & ; & | x | < 1 cases ) is differentiable at every point of the domain, then the values of a and b are respectively:

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92

If the function f(x) = cos ( sinx ) - cosx x ^ 4 is continuous at each point in its domain and f(0) = (1)/(k), then k is _________.

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93

Let α ∈ R be such that the function f(x) = \ cases ^ - 1 (1 - \ x\ ^ 2 ) ^ - 1 (1 - \ x\ ) \ x\ - \ x\ ^ 3 , & x ≠ 0 α, & x = 0 cases ) is continuous at x = 0, where \ x\ = x

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94

Let f: R → R and g: R → R be defined as f(x) = \ cases x + a, & x

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95

Let the functions f: R → R and g: R → R be defined as : f(x) = \ cases x + 2, & x Then, the number of points in R where (fog)(x) is NOT differentiable is equal to :

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96

Let f: R be defined as f(x) = \ cases 2sin(- ( )/(2)), & ifx 1 cases ) If f(x) is continuous on R , then a + b equals :

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97

Let f be any function defined on R and let it satisfy the condition: |f(x) - f(y)| ≤ | (x - y) ^ 2 |, ∀ (x, y) ∈ R . If f(0) = 1, then :

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98

A function f is defined on [ - 3, 3 ] as f(x) = \ array ll min \ | x | , 2 - x ^ 2 \ , - 2 ≤ x ≤ 2 [ | x | ] , 2 where [ x ] denotes the greatest integer ≤ x . The number of

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99

The number of points, at which the function f(x) = |2x + 1| - 3|x + 2| + | x ^ 2 + x - 2|, x ∈ R is not differentiable, is

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100

If f: R → R is a function defined by f(x) = [x - 1]cos((2x - 1)/(2))π, where [·] denotes the greatest integer function, then f is:

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101

Let the functions f: (- 1, 1) → ℝ and g: (- 1, 1) → (- 1, 1) be defined by f(x) = |2x - 1| + |2x + 1| and g(x) = x - [x] , where [x] denotes the greatest integer less than or

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102

Let f: ℝ → ℝ and g: ℝ → ℝ be functions satisfying f(x + y) = f(x) + f(y) + f(x)f(y)andf(x) = xg(x) for all x, y ∈ ℝ . If _ x → 0 g(x) = 1, then which of the following statements

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103

Let the function f: R → R be defined by f(x) = x ^ 3 - x ^ 2 + (x - 1)sinx and let g: R → R be an arbitrary function. Let fg: R → R be the product function defined by (fg)(x) =

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104

Let f: R → R be a function defined by f(x) = max\ x, x ^ 2 \ .Let S denote the set of all points in R ,where f is not differentiable.Then :

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105

Let f: R → R be defined as f(x) = \ cases x ^ 5 sin((1)/(x)) + 5 x ^ 2 & , & x 0 cases ). The value of λ for which f ^ " ( 0 ) exists, is___.

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106

If the function f(x) = \ cases k _ 1 ( x - π ) ^ 2 - 1, & x ≤ π k _ 2 cosx, & x > π cases ) is twice differentiable, then the ordered pair ( k _ 1 , k _ 2 ) is equal to:

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107

Let f ( x ) = x · [(x)/(2)], for - 10 < x < 10, where [t] denotes the greatest integer function. Then the number of points of discontinuity of f(x) is equal to

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108

The function f(x) = \ cases (π)/(4) + ^ - 1 x, & |x| ≤ 1 (1)/(2)(|x| - 1), & |x| > 1 cases ) is :

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109

Let f: ( 0, ∞ ) → ( 0, ∞ ) be a differentiable function such that f ( 1 ) = e and _ t → x t ^ 2 f ^ 2 ( x ) - x ^ 2 f ^ 2 ( t ) t - x = 0 . If f ( x ) = 1 , then x is equal to:

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110

If a function f(x) defined by f(x) = \ cases a e ^ x + b e ^ - x , & - 1 ≤ x

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111

Let [t] denote the greatest integer ≤ t and _ x → 0 ⁡ x[(4)/(x)] = A . Then the function, f(x) = [ x ^ 2 ]sin ⁡ ( ) is discontinuous, when x is equal to:

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112

If f(x) = \ cases (sin(a + 2)x + sinx)/(x) & ; x 0 cases ) is continuous at x = 0 , then a + 2b is equal to:

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113

Let S , be the set of all functions f: [0, 1] → R , which are continuous on [0, 1] , and differentiable on (0, 1) . Then for every f in S , there exists c ∈ (0, 1), depending on f

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114

If the function f defined on (- (1)/(3), 1 / 3) by f(x) = \ cases (1)/(x) _ e ((1 + 3x)/(1 - 2x)), & whenx ≠ 0 k & , whenx = 0 cases ), is continuous, then k is equal to.

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115

Let S be the set of points where the function , f(x) = | 2 - | x - 3 | , x ∈ R, is not differentiable. Then ∑ _ x ∈ S f(f(x)) is equal to

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116

The number of discontinuity of the greatest integer function f (x) = [x], x ∈ (- (7)/(2),100) is equal to

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117

In ( 0, 2π ) , the total number of points where f(x) = max. \ sin ⁡ x, cos ⁡ x, 1 – cos ⁡ x\ is not differentiable, are equal to

NTA Abhyas JEE Main 2020 Solution
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118

The value of f (0) so that the function f (x) = 1 - (1 - x) x^ 4 is continuous everywhere is k, then value of 10k is&

NTA Abhyas JEE Main 2020 Solution
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119

The function f(x) = (1 - sinx + cosx)/(1 + sinx + cosx) is not defined at x = π . The value of f ( π ) , so that f ( x ) is continuous at x = π , is

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120

If f(x) = \ cases 4 + ax - 4 - ax x , & - 1 ≤ x < 0 (3x + 2)/(x - 8) , & 0 ≤ x ≤ 1 cases ) is continuous in [ - 1, 1 ], then the value of a is

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121

Given f ( x ) = array ll x ^ 2 e ^ 2 ( x - 1 ) , 0 ≤ x ≤ 1 . asgn ( x + 1 ) cos ( 2x - 2 ) + b x ^ 2 , 1 < x ≤ 2 array If f( x ) is differentiable at x = 1, then the value of | a

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122

For x ∈ ℝ, f (x) = | log ⁡ 2 - sin ⁡ x| and g(x) = f (f (x)) , then

NTA Abhyas JEE Main 2020 Solution
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123

Let f, g and h are differentiable functions. If f(0) = 1; g(0) = 2; h(0) = 3 and the derivatives of their pair wise products at x = 0 are (fg) '(0) = 6;(gh) '(0) = 4 and (hf) '

NTA Abhyas JEE Main 2020 Solution
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124

If f(x) = \ cases x^ p cos ⁡ ((1)/(x)), & x ≠ 0 0, & x = 0 cases ) is differentiable at x = 0 , then

NTA Abhyas JEE Main 2020 Solution
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125

The function f (x) =\ x\ (π [x]),where [.] denotes the greatest integer function and . is the fractional part function, is discontinuous at

NTA Abhyas JEE Main 2020 Solution
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126

On differentiating ^ -1 [ 1 + x^ 2 - 1 x ] with respect to x , the result would be

NTA Abhyas JEE Main 2020 Solution
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127

Let f: (- 1, 1) → R be a function defined by f(x) = max ⁡ \ - |x|, - 1 - x^ 2 \ . If K be the set of all points at which f is not differentiable, then K has exactly

NTA Abhyas JEE Main 2020 Solution
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128

If f(x) = max ⁡ \ (x)/(n), |sin ⁡ |\ , n ∈ ℕ has maximum points of non-differentiability for x ∈ (0,4) , then n cannot be

NTA Abhyas JEE Main 2020 Solution
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129

The value of f (0) , such that f (x) = 1 x^ 2 (1 - cos( x)) can be made continuous at x = 0, is&

NTA Abhyas JEE Main 2020 Solution
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130

The number of points at which the function f(x) = |x - 0.5| + |x - 1| + tan ⁡ x is not differentiable in the interval (0,2) is/are

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131

If f(x) = \ cases - 2sinx & π ≤ x ≤ (3π)/(2) pcosx + q & (3π)/(2) < x < 2π cosx - 2 & 2π ≤ x ≤ (5π)/(2) rsinx & (5π)/(2) < x ≤ 3π cases ) is continuous in [π, 3π] , then the

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132

If f(x) = \ array ll λ 2x + 3 , 0 ≤ x ≤ 3 + 12,3 < x ≤ 9 array is differentiable at x = 3 , then the value of λ + μ is equal to

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133

If f(x) = \ cases (sin2x)/(cx) + x 4( x + a ^ 2 - a) & ; x ≠ 0, (a < 0, c ≠ 0) b & ; x = 0, (b ≠ 0) cases ) and f(x) is continuous at x = 0 , then the value of bc is equal to

NTA Abhyas JEE Main 2020 Solution
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134

If f(x) = \ cases 1 + 5 + x - a (x - 4) & 0 ≤ x then value of (1)/(ab) is equal to

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135

If f(x) = \ cases px + q & : & x ≤ 2 x ^ 2 - 5x + 6 & : & 2 then |p| + |q| + |(1)/(a)| + |(1)/(b)| is equal to

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136

Let f(x) = \ cases a & ; x = (π)/(2) 2x - π 9 + 2x - π - b & ; x > (π)/(2) cases ). If f(x) is continuous at x = (π)/(2) , then the value of a ^ 2 5b is

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137

If f(x) = \ cases (1 + |sinx|)(p)/(|sin ⁡ x|) & : & - (π)/(6) < x < 0 q & : & x = 0 e ^ tan ⁡ 3x . cot ⁡ 5x & : & 0 < x < (π)/(6) cases ) is continuous at x = 0 , then the value

NTA Abhyas JEE Main 2020 Solution
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138

Let f(x) = 10 - |x - 5|, x ∈ ℝ , then the set of all values of x at which f (f (x)) is not differentiable is

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139

If f(x) = \ cases a + bcosx + csinx x ^ 2 & ; & x > 0 9 & ; & x ≤ 0 cases ) is continuous at x = 0 , then the value of (|a| + |b|)/(5) is

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140

If f(x) = [x] ^ \ x\ + \ x\ ^ [x] + sin ⁡ ( ), where [·] and · represent the greatest integer function and the fractional part function respectively, then f^ ' ((7)/(2))is equal to

NTA Abhyas JEE Main 2020 Solution
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141

Consider the function f(x) = max\ |sin ⁡ x|, |cos ⁡ x|\ , ∀ x ∈ [0,3π] . If λ is the number of points at which f(x) is non-differentiable, then the value of λ ^ 3 5 is

NTA Abhyas JEE Main 2020 Solution
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142

If f(x) = \ cases x 4 + x - a & x > 0 c & x = 0 (4e(2)/(x) + 3e(1)/(x))/(e(2)/(x) + be(1)/(x)) & x < 0 cases ) is continuous at x = 0 for some constants a, b and c , then the

NTA Abhyas JEE Main 2020 Solution
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143

If f(x) = \ cases 2x^ 2 + 3 & ; & x > 3 ax^ 2 + bx + 1 & ; & x ≤ 3 cases ) is differentiable everywhere, then a b^ 2 is equal to

NTA Abhyas JEE Main 2020 Solution
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144

The function f(x) = max\ (1 - x), (1 + x), 2\ ∀ x ∈ ℝ is

NTA Abhyas JEE Main 2020 Solution
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145

Consider the function f (x) = (x^ 3 - x)| x^ 2 - 6x + 5|, ∀ x ∈ ℝ , then f(x) is

NTA Abhyas JEE Main 2020 Solution
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146

Consider the function f(x) = (sin ⁡ 2x)tan^ 2 2x, x ≠ (π)/(4) . The value of f( (π)/(4) ) such that f is continuous at x = (π)/(4) is

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147

If f (x) = min \ 9 - x^ 2 , 1 + x^ 2 \ , ∀ x ∈ [-3,3], then the number of point(s) wheref (x) is non-differentiable is/are

NTA Abhyas JEE Main 2020 Solution
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148

If f(x) = \ array ll ( 2 ^ x - 1) ^ 2 tan ⁡ 3x xsi n ^ 2 x λ array array ll : : array array ll 0 < x < (π)/(6) x = 0 array is continuous at x = 0 , then the value of 10 3λ ln2 is

NTA Abhyas JEE Main 2020 Solution
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149

Consider the function f(x) = \ cases sin (x - 4). ^ -1 ((1)/(x - 4)) & x ≠ 4 0 & x = 4 cases ,) then

NTA Abhyas JEE Main 2020 Solution
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150

If f(x) = \ cases x^ p + 1 (1)/(x) & :x ≠ 0 0 & :x = 0 cases ,) then at x = 0 the function f (x) is

NTA Abhyas JEE Main 2020 Solution
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151

Let f(x) = \ cases (1)/(x2) & : |x| ≥ 1 ^ 2 + β& : |x| < 1 cases .) If f (x) is continuous and differentiable at any point, then

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152

Consider the function f(x) = min\ |x^ 2 - 9|, | x^ 2 - 1|\ , then the number of points where f(x) is non-differentiable is/are

NTA Abhyas JEE Main 2020 Solution
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153

The value of f (0) such that the function f(x) = (1 + 2x3 - 1 + x4)/(x) is continuous at x = 0, is

NTA Abhyas JEE Main 2020 Solution
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154

If f(x) = \ cases e ^ (1 + (1)/(x)) - a e(1)/(x) + 1 & : & x ≠ 0 b & : & x = 0 cases ) (where a and b are arbitrary constants) is continuous at x = 0 , then the value of a ^ 2 is

NTA Abhyas JEE Main 2020 Solution
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155

If f(x) = \ cases e^ [x] + |x| - 1 [x] + |x| & : x ≠ 0 - 1 & : x = 0 cases ) (where [.] denotes the greatest integer function), then

NTA Abhyas JEE Main 2020 Solution
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156

The function f(x) = _ n → ∞ (x - 2) ^ 2n - 1 (x - 2) ^ 2n + 1 (∀ n ∈ ℕ) is discontinuous at&

NTA Abhyas JEE Main 2020 Solution
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157

If f(x) = \ cases a + cos^ - 1 (x + b) & : & x ≥ 1 - x & : & x < 1 cases ) is differentiable at x = 1 , then the value of b - a is equal to

NTA Abhyas JEE Main 2020 Solution
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158

Let f(x) = \ cases ( 1 - cosx (2π - x) ^ 2 )( ^ 2 x log(1 + 4 π ^ 2 - 4 + x ^ 2 ) ) & : & x ≠ 2π λ & : & x = 2π cases ) is continuous at x = 2π , then the value of λ is equal to

NTA Abhyas JEE Main 2020 Solution
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159

If f(x) = \ cases e^ 2x^ 2 + x & : x > 0 ax + b & : x ≤ 0 cases ) is differentiable at x = 0, then

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160

Let f: R → R be differentiable at c ∈ R and f(c) = 0 . If g(x) = |f(x)| , then at x = c, g is:

JEE Main 2019 Solution
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161

If f(x) = \ cases (sin ( p + 1 ) x + sinx)/(x) & , & x 0 cases ) is continuous at x = 0 , then the ordered pair ( p, q ) is equal to:

JEE Main 2019 Solution
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162

If the function f(x) = \ array ll a|π - x| + 1, x ≤ 5 b|x - π| + 3, x > 5 array ) is continuous at x = 5, then the value of a - b is:

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163

Let f(x) = 15 – |x – 10|; x ∈ R . Then the set of all values of x , at which the function g(x) = f ( f(x) ) is not differentiable, is:

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164

If the function f defined on ((π)/(6), (π)/(3)) by f(x) = \ array ll 2 cosx - 1 cotx - 1 , x ≠ (π)/(4) k, x = (π)/(4) array ) is continuous, then k is equal to

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165

Let ∑ _ k = 1 ^ 10 f(a + k) = 16( 2 ^ 10 - 1), where the function f satisfies f(x + y) = f(x)f(y) for all natural numbers x, y and f(1) = 2 . Then the natural number 'a' is:

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166

Let f: [- 1,3] → R be defined as f(x) = \ array ll |x| + [x] , x + |x| , x + [x] , array array ll - 1 ≤ x Where [t] denotes the greatest integer less than or equal tot . Then, f

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167

Let S be the set of all points in (- π, π) at which the function, f(x) = min\ sinx, cosx\ is not differentiable. Then S is a subset of which of the following?

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168

Let K be the set of all real values of x where the function f(x)= |x|-|x|+2(x-π) |x| is not differentiable. Then the set K is equal to :

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169

Let f(x)=\ array cl -1, & -2 ≤ x < 0 x^ 2 -1, & 0 ≤ x ≤ 2 array . and g(x)=|η(x)|+f(x ) . Then, in the interval (-2,2), g is:

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170

Let f: (- 1, 1) → R be a function defined by f(x) = max\ - |x|, - 1 - x ^ 2 \ . If K be the set of all points at which f is not differentiable, then K has exactly

JEE Main 2019 Solution
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171

Let f(x) = \ cases max(|x|, x ^ 2 ), & |x| ≤ 2 8 - 2|x|, & 2 < |x| ≤ 4 cases .) Let S be the set of points in the interval (- 4, 4) at which f is not differentiable. Then S

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172

Let f be a differentiable function from R to R such that |f(x) - f(y)| ≤ 2 |x - y| ^ 3 / 2 , for all x, y ∈ R. If f(0) = 1 then ∫ _ 0 ^ 1 f ^ 2 (x)dx is equal to

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173

Let f: R → R be a function defined as f(x) = \ array ll 5, ifx ≤ 1 a + bx, if1 Then f is:

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174

Let f _ 1 : ℝ → ℝ, f _ 2 (- (π)/(2), (π)/(2)) → ℝ, f _ 3 : (- 1, e ^ (π)/(2) - 2) → ℝ and f _ 4 : ℝ → ℝ be functions defined by (i) f _ 1 (x) = sin ⁡ ( 1 - e ^ - x ^ 2 ) (ii) f _

JEE Advanced 2018 Solution
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175

If the function f defined as f(x) = (1)/(x) - k - 1 e ^ 2x - 1 , x ≠ 0 is continuous at x = 0 , then ordered pair (k, f(0)) is equal to

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176

Let f(x)=\ array cc (x-1)^ (1)/(2-x) , & x>1, x ≠ 2 k, & x=2 array . The value of k for which f is continuous at x=2 is

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177

Let S=\ (λ, μ) ∈ R × R: f(t)=(|λ| e^t-μ) · (2|t|). , t ∈ R , is a differentiable function \ . Then S is a subest of?

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178

Let S = (λ, μ) ∈ R × R: f(t) = (|λ| e ^ |t| - μ)sin ⁡ (2|t|), t ∈ R is a differential function . Then, S is a subset of :

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179

Let S = \ t ∈ R: f(x) = |x - π| ⋅ ( e ^ |x| - 1)sin|x|is not differentiable att\ . Then, the set S is equal to:

JEE Main 2018 Solution
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180

Let [x] be the greatest integer less than or equals to x . Then, at which of the following point(s) the function f(x) = xcos ⁡ (π(x + [x])) is discontinuous?

JEE Advanced 2017 Solution
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181

The value of k which the function f(x) = \ cases ((4)/(5))(tan ⁡ 4x)/(tan ⁡ 5x), & 0 < x < (π)/(2) k + (2)/(5), & x = (π)/(2) cases ) is continuous at x = (π)/(2), is

JEE Main 2017 Solution
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182

Let a, b ∈ ℝ and f: ℝ → ℝ be defined by f(x) = acos ⁡ (| x ^ 3 - x|) + b|x|sin ⁡ (| x ^ 3 + x|) . Then f is -

JEE Advanced 2016 Solution
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183

Let f: [- (1)/(2), 2] → ℝ and g: [- (1)/(2), 2] → ℝ be functions defined by f(x) = [ x ^ 2 - 3] and g (x) = |x|f(x) + |4x - 7| f (x) , where [y] denotes the greatest integer less

JEE Advanced 2016 Solution
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184

Let a, b ∈ R, (a ≠ 0) . If the function f , defined as f(x) = \ array ll 2 x ^ 2 a , 0 ≤ x < 1 a, 1 ≤ x < 2 2 b ^ 2 - 4b x ^ 3 , 2 ≤ x < 8 array ,is continuous in the interval [0

JEE Main 2016 Solution
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185

If the function f(x) = \ cases - x, & x < 1 a + ^ - 1 ⁡ (x + b), & 1 ≤ x ≤ 2 cases ) is differentiable at x = 1 , then (a)/(b) is equal to

JEE Main 2016 Solution
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186

For x ∈ R, f(x) = |log ⁡ 2 - sin ⁡ x| and g(x) = f(f(x)) , then

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187

Let g: ℝ → ℝ be a differentiable function with g(0) = 0, g ^ ′ (0) = 0 and g ^ ′ (1) ≠ 0 . Let f(x) = \ cases (x)/(| x |)g(x), & x ≠ 0 0, & x = 0 cases ) and h(x) = e ^ | x | for

JEE Advanced 2015 Solution
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188

Let k be a non - zero real number. If f(x) = \ array ll ( e ^ x - 1 ) ^ 2 sin((x)/(k))log(1 + (x)/(4)) , x ≠ 0 array cases 12, & x = 0 cases ) is a continuous function at x = 0

JEE Main 2015 Solution
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189

If the function g (x) = cases k x + 1 , & 0 ≤ x ≤ 3 mx + 2, & 3 < x ≤ 5 cases is differentiable, then the value of k + m is

JEE Main 2015 Solution
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190

Let f: [a, b] → [1, ∞) be a continuous function and let g: R → R be defined as g(x) = \ cases 0 & if & x b cases ) . Then

JEE Advanced 2014 Solution
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191

Let f: R → R and g: R → R be respectively given by f(x) = |x| + 1 and g(x) = x ^ 2 + 1 . Define h: R → R by h(x) = \ cases max ⁡ \ f(x), g(x)\ & if & x ≤ 0 min ⁡ \ f(x), g(x)\ &

JEE Advanced 2014 Solution
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192

If the function f(x) = \ cases 2 + cos x - 1 (π - x) ^ 2 , & x ≠ π k, & x = π cases ) is continuous at x = π , then k equals

JEE Main 2014 Solution
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193

Let f: R → R be a function such that |f(x)| ≤ x ^ 2 , for all x ∈ R . Then, at x = 0, f is

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194

Let f, g: R arrow R be two functions defined by f(x)= cases x ((1)/(x)) & , x ≠ 0 0, & , x=0 cases and g(x)=x f(x) Statement I: f is a continuous function at x=0 . Statement II: g

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195

Let f(x)=x|x|, g(x)= x and h(x)=(g ∘ f)(x) . Then

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196

Consider the function : f(x)=[x]+|1-x|,-1 ≤ x ≤ 3 where [x] is the greatest integer function. Statement 1: f is not continuous at x=0,1,2 and 3 Statement 2:f(x)= = array cc -x, &

JEE Main 2013 Solution
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197

Let f be a composite function of x defined by f(u)=(1)/(u^2+u-2), u(x)=(1)/(x-1) . Then the number of points x where f is discontinuous is :

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198

Let f(x)=-1+|x-2| , and g(x)=1-|x| ; then the set of all points where f_ o g is discontinuous is :

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199

For every integer n , let a_ n and b_ n be real numbers. Let function f: I R arrow I R be given by f(x)=\ array lll a_ n + π x, & for & x ∈[2 n, 2 n+1] b_ n + π x, & for & x ∈(2

JEE Advanced 2012 Solution
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200

Let ∫(x)=\ array r x^ 2 | (π)/(x)|, x ≠ 0 0, x=0 array , x ∈ R. then ∫ is

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