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please solve rd sharma class 12 chapter Indefinite Integrals exercise 18.2 question 10 maths textbook solution

Answers (1)

\frac{2}{9} x^{\frac{9}{2}}-4 x^{\frac{1}{2}}+c

Hint: To solve this we multiply\sqrt{x}to next term

Solution:  We have ,  

   I=\int \sqrt{x}(x^{3}-\frac{2}{x})dx

\begin{aligned} &\text { Using identity }\\ &\left\{\int x^{a} d x=\frac{1}{a+1} x^{a+1}+c, a \neq-1\right\}\\ &=\frac{1}{\frac{7}{2}+1} x^{\frac{7}{2}+1}-2 \frac{1}{1-\frac{1}{2}} x^{1-\frac{1}{2}}+c\\ &=\frac{1}{\frac{9}{2}} x^{\frac{9}{2}}-\frac{2}{\frac{1}{2}} x^{\frac{1}{2}}+c\\ &=\frac{2}{9} x^{\frac{9}{2}}-4 x^{\frac{1}{2}}+c \end{aligned}

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