$\"\"$

$\"\"$ is an increasing such that $\"\"$ and $\"\"$ .

Find $\"\"$ .

Theorem 7:

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

differentiable at $\"\"$ and $\"\"$ .

Find $\"\"$ .

From the inverse function definition, if $\"\"$ then $\"\"$ .

Therefore, if $\"\"$ then $\"\"$ .

$\"\"$

Substitute $\"\"$ in above expression.

$\"\"$ .

$\"\"$

$\"\"$ .