NDA 2026
- Exam
- NDA
- Year
- 2026
- Subject
- Mathematics
- Chapter
- Continuity and Differentiability
NDA 2026 · Mathematics · Continuity and Differentiability
Passage: Let f(x)= (x^2) and g(x)=x|x| for |x| Question: If...
Passage: Let and for .
Question: If , then which of the following statements is/are correct ?
I. is continuous at .
II. is differentiable at .
Select the answer using the code given below :
Question: If , then which of the following statements is/are correct ?
I. is continuous at .
II. is differentiable at .
Select the answer using the code given below :
Options
- AI only
- BII only
- CBoth I and II
- DNeither I nor II
Correct answer
C. Both I and II
Step-by-step solution
Given and .
The function is given by .
We can redefine as:
for
for
Checking continuity at :
Since , is continuous at . Statement I is correct.
Checking differentiability at :
Right Hand Derivative (RHD) at :
Left Hand Derivative (LHD) at :
Since RHD = LHD = , is differentiable at . Statement II is correct.
Both statements I and II are correct.
Answer: Both I and II
The function is given by .
We can redefine as:
for
for
Checking continuity at :
Since , is continuous at . Statement I is correct.
Checking differentiability at :
Right Hand Derivative (RHD) at :
Left Hand Derivative (LHD) at :
Since RHD = LHD = , is differentiable at . Statement II is correct.
Both statements I and II are correct.
Answer: Both I and II