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Let a, b in RR and f:RR to RR be defined...

Let `a, b in RR` and `f:RR to RR` be defined `f(x)=acos(|x^(3)-x|)+b|x|sin(|x^(3)+x|)`. Then f is

A

differentiable at x = 0, if a = 0 and b = 1

B

differentiable at x = 1, if a = 1 and b = 0

C

not differentiable at x = 0 if a = 1 and b = 0

D

not differentiable at x = 1, if a = 1 and b = 1

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