$\"\"$

\

The function is $\"\"$ .

\

Find $\"\"$ .

\

Theorem :

\

If $\"\"$ is a one to one differentiable function with inverse function $\"\"$ and $\"\"$ then the inverse function is differentiable at $\"\"$ and $\"\"$ .

\

Find $\"\"$ .

\

Equate the function to $\"\"$ .

\

$\"\"$ .

\

By trail and error method, the equation is satisfied at $\"\"$ .

\

Hence $\"\"$ is the solution of the equation.

\

Therefore $\"\"$ then $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

Differentiate the function with respect to $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

By the theorem, $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

$\"\"$ .