The function is $\"\"$ and $\"\"$ .

Substitute $\"\"$ in the function $\"\"$ .

$\"\"$

The value of $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .

Find which number make the fraction undefined, create an equation where the denominator is equal to zero.

$\"\"$

The function is undefined at $\"\"$ .

The value of $\"\"$ is $\"\"$ and the function is undefined at $\"\"$ .