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Let f(x)=|x4|. Evaluate the following limits. f(x)-f(4) lim-4 2-4 f(x)-f(4) lim+4+ = 2-4 Thus the function f(x) is not differentiable at 1

Let f(x)=|x4|. Evaluate the following limits. f(x)-f(4) lim-4 2-4 f(x)-f(4) lim+4+ = 2-4 Thus the function f(x) is not differentiable at 1

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