$\"\"$

The function is $\"\"$ , $\"\"$ .

Mean value theorem :

Let $\"\"$ be a function that satisfies the following hypotheses :

1. $\"\"$ is continuous on $\"\"$ .

2. $\"\"$ is differentiable on $\"\"$ .

Then there is a number $\"\"$ in $\"\"$ such that, $\"\"$ .

$\"\"$

The function $\"\"$ is continuous over closed interval $\"\"$ .

The function $\"\"$ is not differentiable at $\"\"$ .

Therefore mean value theorem can not be applied.

$\"\"$

Mean value theorem can not be applied.