$\"\"$

Let the rational function be $\"\"$ .

Vertical asymptote can be found by equating the denominator to $\"\"$ .

The denominator of the rational function is $\"\"$ .

Equate $\"\"$ to $\"\"$ .

$\"\"$

$\"\"$ .

Therefore, $\"\"$ must be the vertical asymptote of the rational function $\"\"$ .

$\"\"$

$\"\"$ must be the vertical asymptote of the rational function $\"\"$ .