求∫x2exdx.

admin2021-03-11  57

问题 求∫x2exdx.

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答案∫x2exdx=∫x2dex=x2ex-∫2xexdx =x2ex-2∫xdex =x2ex-2(xex-∫exdx) =x2ex-2xex+2ex+C

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