$\"\"$

The function is $\"\"$ .

Graph the function:

$\"\"$

Observe the graph:

As $\"\"$ tends to $\"\"$ from left, the function approaches to $\"\"$ .

$\"\"$ .

$\"\"$

The function is $\"\"$ .

Factorize the numerator.

$\"\"$

Cancel the common terms.

$\"\"$ .

$\"\"$

Thus, $\"\"$ .

$\"\"$

$\"\"$ .