$\"\"$

The function is $\"\"$ .

All possible values of $\"\"$ is the domain of the function.

Since the function $\"\"$ is a rational function, the denominator of the function should not be the zero.

$\"\"$

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

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

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