Let f : R ? R be a function defined by f(x) = max. {x, x3}. The set of all poin

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Let f : R ? R be a function defined by f(x) = max. {x, x3}. The set of all points where f(x) is not differentiable is

Options:

A . {-1, 1}

B . {-1, 0}

C . {0, 1}

D . {-1, 0, 1}

Answer: Option D

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