$\"\"$

The function is $\"\"$ .

Find the derivative of the function.

Limit definition of derivative : $\"\"$ .

$\"\"$

$\"\"$ .

For left hand limit, $\"\"$ .

$\"\"$

For right hand limit, $\"\"$ .

$\"\"$

As the left hand limit and right hand limit are not equal, limit of the derivative function does not exist.

Hence derivative of the function is dicontinuous at $\"\"$ .

$\"\"$

Derivative of the function is dicontinuous at $\"\"$ .