Re: [積分] 台大(甲)
dx 1+e^x e^x
∫----------- = ∫----------dx - ∫---------dx
(1+e^x)^2 (1+e^x)^2 (1+e^x)^2
dx e^x
= ∫----------- - ∫---------dx
(1+e^x) (1+e^x)^2
這樣應該會積了吧
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