Let a, b be real numbers and consider the integral (ax² + b) cos(x)dx. Using integration by parts will lead to which of the following expressions? Show workings. • A. (ax² + b) cos(x) +2a / xsin(x)dx • B. 2axcos(x)+2 / (ax² +b) sin(x)dx • C. (ax +b) sin(x) – 2a / xsin(x) dx • D. (ax² +b) cos(x) – 2a | xcos(x)dx • E. 2axsin(x) – 2 / (ax² +b) sin(x)dx Show workings. Find w? In(w)dw. A. w3 In(w) + C 4,

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