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  • Explain solution RD Sharma class 12 chapter Indefinite Integrals exercise 18.8 question 12 maths

Explain solution RD Sharma class 12 chapter Indefinite Integrals exercise 18.8 question 12 maths

Answers (1)

Answer:

        \frac{1}{3}log\left | e^{3x}+1 \right |+C

Hint:

        \int \! e^{x}dx=e^{x}+C\; \; \; \; or\; \; \; \; \int \! \frac{1}{x}dx=log\left | x \right |+C

Given:

        \int \! \frac{e^{3x}}{e^{3x}+1}dx

Explanation:

{e^{3x}+1}=t

3e^{3x}dx=dt

            =\frac{1}{3}\! \int \! \frac{dt}{t}

            =\frac{1}{3}log\left | t \right |

            =\frac{1}{3}log\left | e^{3x} \right |+C

Posted by

Gurleen Kaur

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