$\"\"$

The function is $\"\"$ .

The domain of a function is set of all values of $\"\"$ , which makes the function mathematically correct.

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

$\"\"$

Graph :

Graph the function $\"\"$ .

$\"\"$

Observe the graph :

The derivative of the function $\"\"$ is discontinuous at $\"\"$ .

$\"\"$ is differentiable at $\"\"$ .

$\"\"$

$\"\"$ is differentiable at $\"\"$ .