$\"\"$

The limit expression is $\"\"$ and $\"\"$ .

Observe the graph :

The graph of $\"\"$ approaches to $\"\"$ from both sides as $\"\"$ .

Therefore, limit exists and $\"\"$ .

The solid dot indicates the value of the function.

The value of the function at $\"\"$ is the $\"\"$ .

$\"\"$ .

$\"\"$

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