∫(1,1)(2,2)xy2dx+x2ydy=________.

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问题(1,1)(2,2)xy2dx+x2ydy=________.

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答案因为xy2dx+x2ydy=d([*]x2y2), 所以∫(1,1)(2,2)xy2dx+x2ydy=[*]x2y2|(1,1)(2,2)=[*]

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