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Mathematics 8 Online
OpenStudy (anonymous):

Directly from the (ε and δ ) definition determine the following derivatives and prove your answer: (a) Let f(x) = 2x + 2. Find f'(-1). (c) Let f(x) = 4x - jx-2j. Find f'(4). Hint: if x is near 4, then you can simplify your absolute value problem.

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