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数学
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∫x^3/1+x^2 dx
人气:259 ℃ 时间:2020-06-07 11:56:04
解答
∫x^3/(1+x^2)dx
=∫[x^3+x-x]/(1+x^2)dx
=∫x-x/(1+x^2)dx
=x²/2-1/2ln[1+x^2]+c
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