
Re: [微積] 積分請教

怎麼感覺你是從微分方程裡學微積分?
S ln|2x + c| dx
= (1/2) S ln|2x + c| d(2x + c)
= (1/2)[(2x + c)ln|2x + c| - (2x + c)]
= (1/2)[ln|2x + c| - 1](2x + c)
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