$\"\"$

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

$\"\"$

Thus, $\"\"$ .

$\"\"$

Thus, $\"\"$ .

$\"\"$ .

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

The domain of $\"\"$ is $\"\"$ .

The domain of $\"\"$ is $\"\"$

Excluded values of $\"\"$ is $\"\"$ .

$\"\"$

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

Excluded values of $\"\"$ is $\"\"$ .