计算下列定积分:
211/x(x+2)dx
计算下列定积分:
211/x(x+2)dx
【正确答案】:∫211/x(x+2)dx =1/2∫21[1/x-1/(x+2)]dx +1/2lnx|21-1/2(x+2)|21 =1/2ln3/2.
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