第1个回答 2020-05-14
∫1/（x^2+1）（x^2＋1 + x -1）dx
= ∫1 + x/(x^2+1）- 1/(x^2+1）dx （partial fraction)
= x + (1/2)ln(x^2+1) - arctan(x) + c本回答被网友采纳
= ∫1 + x/(x^2+1）- 1/(x^2+1）dx （partial fraction)
= x + (1/2)ln(x^2+1) - arctan(x) + c本回答被网友采纳
第2个回答 2021-02-01
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