$\"\"$

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

Observe the graph :

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

Therefore limit exists and $\"\"$ .

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

Hence, $\"\"$ .

$\"\"$

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