$\"\"$

The function is $\"\"$ .

Observe the graph the $\"\"$ - intercepts are $\"\"$ and $\"\"$ .

So $\"\"$ , from Rolle $\"\"$ s theorem we know that there exist at least one $\"\"$ in the interval $\"\"$ such that $\"\"$ .

$\"\"$ .

Differentiate on each side with respect $\"\"$ .

$\"\"$

Equate it to zero.

$\"\"$

Hence there exist $\"\"$ in the interval $\"\"$ .

Therefore $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .