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∫ 1 X Log X D X - Mathematics

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Question

\[\int\frac{1}{x \log x} dx\]
Sum
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Solution

\[\text{Here, we are considering }\text{log x  as} \log_e x . \]
\[\text{Let I} = \int\frac{1}{x \log x}dx\]
\[\text{Putting }\log x = t\]
\[ \Rightarrow \frac{1}{x} = \frac{dt}{dx}\]
\[ \Rightarrow \frac{1}{x}dx = dt\]
\[ \therefore I = \int\frac{1}{t}dt\]
\[ = \text{log} \left|  \text{log x} \right| + C\]

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Chapter 19: Indefinite Integrals - Exercise 19.08 [Page 47]

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RD Sharma Mathematics [English] Class 12
Chapter 19 Indefinite Integrals
Exercise 19.08 | Q 18 | Page 47

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