$\"\"$

The function is $\"\"$ .

The function under the square root should be zero or positve.

$\"\"$

The domain of the function is $\"\"$ .

Find the left hand and the right hand derivative of the function.

Left hand limit definition of derivative : $\"\"$ .

$\"\"$

$\"\"$ does not exist.

Right hand limit definition of derivative : $\"\"$ .

Since the domain of the function is $\"\"$ , the right hand derivative of the function does not exist.

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

Hence the function is not differentiable at $\"\"$ .

$\"\"$

The function is not differentiable at $\"\"$ .