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  • Need solution for RD Sharma Maths Class 12 Chapter 18 Indefinite Integrals Excercise Very Short Answers Question 49

Need solution for RD Sharma Maths Class 12 Chapter 18 Indefinite Integrals Excercise Very Short Answers Question 49

Answers (1)

Answer: \frac{x^{3}}{3}+x+c

Hints: You must know about the integral rule of functions.

Given: \int \frac{x^{3}-x^{2}+x-1}{x-1}dx

Solution:

\begin{aligned} &\int \frac{x^{3}-x^{2}+x-1}{x-1} d x \\ &\int \frac{x^{2}(x-1)+1(x-1)}{x-1} d x \\ &\int \frac{\left(x^{2}+1\right)(x-1)}{x-1} d x \\ &\int\left(x^{2}+1\right) d x \end{aligned}

\begin{aligned} &\int x^{2} d x+\int 1 d x \\ &=\frac{x^{3}}{3}+x+c \quad\quad\quad\quad\quad\left[\int x^{n} d x=\frac{x^{n+1}}{n+1}\right]\\ \end{aligned}

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