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5 Multiple Answer 15 points Which of the following represent the correct derivative of f (x ) = x3 cos a? Choose all that apply. f (x) = 3x2 cosx - x sin x f' (x) = x2 (3 cos x - x sin x) f' (x) = x2 (3 cos x + x sin x) O f' (x) = 3x2 sin ac f' (x) =-3x2 sin x O f (x) = 3x2 cos x + 23 sin x