Integrate lnx / x? - Yahoo Answers hey there. Ok, well let's see here. let's try a u substitution. I'll call: u = lnx du = 1/x dx dx = x du. So, substitute in: Integral (u/x (xdu)) x's cancel out:
Integral ln(x) - Math2.org Proof. Strategy: Use Integration by Parts. (integral) ln(x) dx. set u = ln(x), dv = dx then we find du = (1/x) dx, v = x. substitute. (integral) ln(x) dx = (integral) u dv.
Integration by Parts 分部積分 x2ln x - $\displaystyle {\textstyle\frac{1}{4}}$ x2 + C. 在我們使用一些實用的小技巧 之前,我們示範如何計算這種形式的定積分。 例題3 定積分計算. $\displaystyle ...
§ 8 分¶«分型 (提示: 可用分部積分法為之). (74年=後醫) j F(x) 為f(x) 之反導數. ∴ F (x) = f(x). 設f 之函數 .... x3 ln x −. 1. 9 x3 + C, C 為任意常數. 8-15 求∫. 1. 0 x lnx dx. (台大農化).