Question: Let f be the absolute value function; that is, Show that and explain why f is not differentiable at x = 0. f(x) = x

Let f be the absolute value function; that is,


f(x) = x -x if x 0 if x < 0


Show that


image


and explain why f is not differentiable at x = 0.

f(x) = x -x if x 0 if x < 0

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