Let , for every real number . Then:
is not differentiable at two values of
Determine the relation between .
We have, . We can write this function in different forms as shown below:
The graph for the given function is as shown:
As we can see from the graph, the function is not differentiable at two points which are and , Also, at , the function represents a straight line having a slope , therefore
Hence, option D is the correct answer.