Question: dy = 12 when x = 2, find f'(4). Let y =(f(u) + 7x)2 and u = x3 - 2x. If f(4) = 8 and

dy = 12 when x = 2, find f'(4). Let y =(f(u) + 7x)2 and u = x3 - 2x. If f(4) = 8 and dx f'( 4) =
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