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Please help! Let f(x) = 2x2 cos(8x). f' (x) = -16x sin ( 8x ) + 4x cos (8x ) f' (2 ) = -64

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Let f(x) = 2x2 cos(8x). f' (x) = -16x sin ( 8x ) + 4x cos (8x ) f' (2 ) = -64 sin (16 ) + 8 cos( 16) f"(x) = f" (2) =

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