∫x的三次方e的x的二次方dx 怎么求?
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原式=(1/2)∫x^2[e^(x^2)]d(x^2)
=(1/2)∫x^2[e^(x^2)]
=(1/2)x^2[e^(x^2)]-(1/2)∫[e^(x^2)]d(x^2)
=(1/2)x^2[e^(x^2)]-(1/2)e^(x^2)+C
=(1/2)∫x^2[e^(x^2)]
=(1/2)x^2[e^(x^2)]-(1/2)∫[e^(x^2)]d(x^2)
=(1/2)x^2[e^(x^2)]-(1/2)e^(x^2)+C
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