Example of Function That Can Be Differentiated Only Once
by Bergdis
(Reykjavík)
Can you give me an example of a function that can be differentiated only once?
Answer by Pablo:
The first example that comes to mind is:
The derivative of this function is:
That is:
We already know that this function is not differentiable at point x=0. For more details read the following page: Limits at Corners.
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