Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET2009MathematicsApplication of Derivatives

If f:[2,3] R is defined by f(x)=x^3+3 x-2 , then the range f(x) is contained in the interval

Options

  1. A[1,12]
  2. B[12,34]
  3. C[35,50]
  4. D[-12,12]

Correct answer

B. [12,34]

Step-by-step solution

Given, f(x)=x^3+3 x-2 On differentiating w.r.t. x , we get aligned & f^ (x)=3 x^2+3 & Put f^ (x)=0 3 x^2+3=0 & x^2=-1 & f(x) is either increasing or decreasing. & At x=2, f(2)=2^3+3(2)-2=12 & At x=3, f(3)=3^3+3(3)-2=34 & f(x) [12,34] . aligned

Practice Application of Derivatives on Quantrex Academy →

More from Application of Derivatives

Consider the quadratic equation a x^2+b x+c=0 , where 2 a+3 b+6 c=0 and let g(x)= a x^3 3 + b x^2 2 +c x . Statement-I : The given quadratic equation ax ^2+ bx + c =0 has at least 2025The difference between the absolute maximum and absolute minimum values of the function f(x)=2 x^3-15 x^2+36 x-30 on [-1,4] is 2025If f(x)=x e^ x(1-x) , x R , then f(x) is 2025The angle between the curves y ^2= x and x ^2= y at the point (1,1) is 2025If the tangent of the curve 4 y^3=3 a x^2+x^3 drawn at the point (a, a) forms a triangle of area 25 24 sq.units with the coordinate axes then a = 2025If the function f(x)= x- ^2 x is defined on the interval [- , ] , then f is strictly increasing in the interval 2025If the Lagrange's mean value theorem is applied to the function f(x)=e^x defined on the interval [1,2] and the value of c (1,2) is k , then e^ k-1 = 2025If the tangent to the curve x y+a x+b y=0 at (1,1) makes an angle Tan ⁻¹ 2 with X -axis, then ab a + b = 2025 Full Application of Derivatives list All AP EAMCET PYQs