A function $f:[0,2] → R$ is strictly increasing in $(0,1)$ and strictly decreasing in $(1,2)$. Then which statement is TRUE?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) - $f'(1)$ may not exist
$⇒f'(1)=0$ or $f'(1)$ doesn't exist
as differentiability is not considered at 1