$\"\"$

The function is $\"\"$ .

Observe the graph.

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

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

Since the left hand limit and right hand limit are equal, limit exist.

Therefore limit exist and is equal to $\"\"$ .

$\"\"$

$\"\"$ .