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  3. 计算∫01dy∫y1x2ex2dx．

计算∫01dy∫y1x2ex2dx．

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问题 计算∫01dy∫y1x2ex2dx．
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答案改变积分次序得 ∫01dy∫y1x2ex2dx＝∫01dx∫0x x2ex2dx [*]
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考研数学三

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