$\"\"$

The functions are $\"\"$ and $\"\"$ . \ \

$\"\"$

Thus, $\"\"$ . \ \

$\"\"$

Thus, $\"\"$ .

$\"\"$ .

Functions $\"\"$ and $\"\"$ are inverse functions.

The domain of $\"\"$ is set of all real numbers.

There is no values of $\"\"$ to be excluded.

$\"\"$

Functions $\"\"$ and $\"\"$ are inverse functions.

There is no values of $\"\"$ to be excluded.