$\"\"$

The limit expression is $\"\"$ .

Graph the function $\"\"$ .

$\"\"$

observe the graph:

As $\"\"$ tends to $\"\"$ , the function value approaches to $\"\"$ .

$\"\"$

If a limit exist, then the left hand limit and right hand limit always equal.

The left hand side limit is $\"\"$ .

Consider the table near left side of $\"\"$ .

\ \

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$

Observe the table:

As $\"\"$ tends to $\"\"$ from the left hand side, then the limit approaches to $\"\"$ .

$\"\"$ .

The right hand side limit $\"\"$ .

Consider the table near right side of $\"\"$ .

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	\ $\"\"$ \	$\"\"$

As $\"\"$ tends to $\"\"$ from the right hand side, then the limit approaches to $\"\"$ .

$\"\"$ .

The right hand side limit is equal to left hand side limit.

Therefore, the limit exists.

$\"\"$ .

$\"\"$

$\"\"$ .