$\"\"$

The limit expression is $\"\"$ .

$\"\"$

Apply quotient property of limits: $\"\"$ , if $\"\"$ .

$\"\"$

Apply sum and difference property of limits: $\"\"$ .

$\"\"$

Apply power and scalar multiple property of limits: $\"\"$ and $\"\"$ .

$\"\"$

Therefore, $\"\"$ .

$\"\"$

$\"\"$ .