$\"\"$

The function is $\"\"$ .

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

Here the function $\"\"$ should not be infinity.

$\"\"$

The denominator of the function should not be zero.

$\"\"$

Hence, the domain of the function is all real numbers except $\"\"$ and $\"\"$ .

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

$\"\"$

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