$\"\"$ \ \

(a) \ \

$\"\"$ and $\"\"$ . \ \

Find $\"\"$ . \ \

$\"\"$ does not exist. \ \

Limit of a rational function does not exist at the point where the denominator is equal to zero. \ \

Find $\"\"$ . \ \

$\"\"$ \ \

Limit of a rational function does not exist at the point where the denominator is equal to zero.

$\"\"$ does not exist. \ \

$\"\"$ \ \

(b) \ \

Find $\"\"$ , where $\"\"$ and $\"\"$ . \ \

$\"\"$ does not exist. \ \

Limit of a rational function does not exist at the point where the denominator is equal to zero. \ \

$\"\"$ \ \

(a) $\"\"$ does not exist. \ \

$\"\"$ does not exist. \ \

(b) $\"\"$ does not exist.