Functions Question 528

Question: Which of the following is not true

[Kurukshetra CEE 1996]

Options:

A) Every differentiable function is continuous

B) If derivative of a function is zero at all points, then the function is constant

C) If a function has maximum or minima at a point, then the function is differentiable at that point and its derivative is zero

D) If a function is constant, then its derivative is zero at all points

Show Answer

Answer:

Correct Answer: C

Solution:

It is fundamental concept.