$\"\"$

The limit expression is $\"\"$ .

(a)

$\"\"$

$\"\"$ .

$\"\"$

(b)

$\"\"$

Apply L $\"\"$ Hospital $\"\"$ s Rule.

L $\"\"$ Hospital $\"\"$ s Rule: If $\"\"$ or $\"\"$ then $\"\"$ .

$\"\"$

$\"\"$ .

$\"\"$

$\"\"$ .