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Let f : R rarr R satisfying l f (x) l <=...

Let `f : R rarr R` satisfying `l f (x) l <= x^2` for `x in R`, then (A) f' is continuous but non-differentiable at x = 0 (B) f' is discontinuous at x = 0 (C) f' is differentiable at x = 0 (D) None of these

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