Mathematics

Mathematics

Problem

Let f:(−1,1)→Rf: (-1, 1) \rightarrow R be a function defined by f(x)=max⁡{−∣x∣,−1−x2}f(x) = \max\{-|x|, -\sqrt{1-x^2}\} . If KK be the set of all points at which ff is not differentiable, then KK has exactly: (a) five elements (b) one element (c) three elements (d) two elements

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