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September 3, 2015

Homework Help: calculus

Posted by Daniel on Sunday, January 29, 2012 at 10:28pm.

Consider the function f(x) = piecewise [(x^3)(cos(1/x)) , x=/=0], [0, x=0]. Use the definition of the derivative at a point to determine if f is differentiable at x=0

I am not sure how to start this question. Am I supposed to plug in x = 0?

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