Tính nguyên hàm: $\int \frac{lnx}{x}dx$
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Posted 13-02-2015 - 15:07
duongtoi
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Tính nguyên hàm: $\int \frac{lnx}{x}dx$
Ta có $\int \frac{lnx}{x}{\rm d}x = \int \ln x{\rm d} \ln x = \frac {\ln ^2x}{2} + C$
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