\

The function is $\"\"$ .

\

Rewrite the function as $\"\"$ .

\

Graph the function $\"\"$ .

\

$\"\"$

\

Observe the graph :

\

Domain set is $\"\"$ .

\

\

Confirm the domain of the function algebraically :

\

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

\

The rational function $\"\"$ .

\

The denominator of the function should not be the zero.

\

$\"\"$

\

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

\

$\"\"$ , $\"\"$ and $\"\"$ .

\

Therefore, the domain of the function is all real values of $\"\"$ except $\"\"$ , $\"\"$ and $\"\"$ .

\

The domain set is $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Hole of the function is $\"\"$ .

\

According to algebraic confirmation, $\"\"$ must also excluded from the domain.

\

The domain set is $\"\"$ .

\

\

The domain set is $\"\"$ .