$\"\"$

\

The function is $\"\"$ .

\

$\"\"$

\

Take squareroot on each side.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Interchange $\"\"$ and $\"\"$ .

\

$\"\"$

\

Therefore , the inverse function is $\"\"$ .

\

$\"\"$

\

The inverse function is $\"\"$ .