Answer:
(0,1)
Step-by-step explanation:
A function is not differentiable if either:
- there is no tangent line or
- there is a vertical tangent line
There are no vertical tangent lines here, but at the point (0,1), there is no tangent line. To the left, the function is increasing, but to the right, the function is decreasing. It is impossible to draw a tangent line here, and as a result, the function is not differentiable at this point
