Q$1(6$ points$)$

Evaluate the following limits$.[2$ MARKS EACH$].$ For limits that are indeterminate, $\frac{0}{0},$ you must factor.

EXERCISE $1.$

$\underset{x-3}{lim}\frac{x^2+5x+6}{x^2-9}$

EXERCISE $2.$

$\underset{x4}{lim}\sqrt[\phantom{2}]{x-4}$

EXERCISE $3.$

$\underset{x-}{lim}\frac{x}{\sqrt[\phantom{2}]{16x^2-x}}$

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