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∫x3−1x2dx\int \frac{x^3 - 1}{x^2} dx is equal to

Solution

✅ Correct Option: 4

∫x3−1x2dx=∫(x3x2−1x2)dx\int \frac{x^3 - 1}{x^2} dx = \int \left(\frac{x^3}{x^2} - \frac{1}{x^2}\right) dx


=∫(x3−2−1x2)dx= \int \left(x^{3-2} - \frac{1}{x^2}\right) dx

=∫(x−1x2)dx= \int \left(x - \frac{1}{x^2}\right) dx

=∫(x−x−2)dx= \int (x - x^{-2}) dx


Using the power rule ∫xndx=xn+1n+1+c\int x^n dx = \frac{x^{n+1}}{n+1} + c:

∫xdx=x22\int x dx = \frac{x^{2}}{2}

∫x−2dx=x−1−1=−x−1=−1x\int x^{-2} dx = \frac{x^{-1}}{-1} = -x^{-1} = -\frac{1}{x}


∫x3−1x2dx=x22−(−1x)+c\int \frac{x^3 - 1}{x^2} dx = \frac{x^2}{2} - \left(-\frac{1}{x}\right) + c

=x22+1x+c= \frac{x^2}{2} + \frac{1}{x} + c

Therefore, the answer is x22+1x+c\frac{x^2}{2} + \frac{1}{x} + c where cc is the constant of integration.

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