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The value of I=∫(x3−1)1/3x5 dxI = \displaystyle\int (x^3-1)^{1/3}x^5\,dx is

Solution

✅ Correct Option: 2

Put u=x3−1u = x^3-1, so du=3x2dxdu = 3x^2dx and x5dx=(u+1)3dux^5dx = \frac{(u+1)}{3}du.

Then I=13∫(u4/3+u1/3)du=u7/37+u4/34+CI = \frac13\int (u^{4/3} + u^{1/3})du = \frac{u^{7/3}}{7} + \frac{u^{4/3}}{4} + C.

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