Let f: (-1,1)toR be a function defind by...

Let `f: (-1,1)toR` be a function defind by f(x) =max. `{-absx,-sqrt(1-x^2)}`. If K is the set of all points at which f is not differentiable, then K has set of all points at which f is not differentiable, then K has exactly

A

One element

B

Two elements

C

Five elements

D

Three elements

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The correct Answer is:

D

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