Use integration by parts to evaluate 2x cos (x) dx -x?cos (x) +c - 2x cos (x) + 2sin(x) +c x?sin (x) + 2xcos (x) +c 2x sin (x) + 2cos (x) +c None of the other answers F 2x sin (x) – 2 cos (x) +c

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A: d2udx2=-x2⇒dudx=-x33+c⇒u=-x412+cx+du(0)=00=du(1)=00=-112+cc=112u(x)=112(-x4+x)

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