$\"\"$

\

The function is $\"\"$ .

\

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

\

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

\

$\"\"$ .

\

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

\

$\"\"$

\

$\"\"$

\

Equate it to zero.

\

$\"\"$

\

For $\"\"$ .

\

$\"\"$

\

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

\

Therefore $\"\"$ .

\

$\"\"$

\

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