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  • need solution for RD Sharma maths class 12 chapter Indefinite Integrals exercise 18.26 question 15

need solution for RD Sharma maths class 12 chapter Indefinite Integrals exercise 18.26 question 15

Answers (1)

Answer:
The correct answer is \log x\; e^{x}+c
Given:

\int e^{x}\left(\log x+\frac{1}{x}\right) d x

Solution:

        I=\int e^{x}\left(\log x+\frac{1}{x}\right) d x

            =\int e^{x} \log x \; d x+\int e^{x} \cdot \frac{1}{x} d x

On integration by parts,

            \begin{aligned} &\log x \; e^{x}-\int \frac{1}{x} \cdot e^{x} d x+\int e^{x} \cdot \frac{1}{x} d x \\ &=\log x \; e^{x}+c \end{aligned}

So, the correct answer is \log x\; e^{x}+c

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