$\"\"$

The function is $\"\"$ and $\"\"$ .

$\"\"$ :

As $\"\"$ approaches to $\"\"$ from left side, $\"\"$ approaches to $\"\"$ .

$\"\"$ :

As $\"\"$ approaches to $\"\"$ from right side, $\"\"$ approaches to $\"\"$ .

Here left hand limit and right limit are not equal.

So $\"\"$ does not exist.

$\"\"$

$\"\"$ is does not exist.