Question

I found a textbook example which intergrates an area function to find the volume of a solid of revolution bounded by the curve f(x) = (x-1)^{2} about the x-axis and the lines x=0 and x=2 using the disk method. The example shows a final solution change of intergration interval to x=1 and x=3 to arrive at the answer of 242pi/3 instead of the original interval x=0 and x=2? Would you show me step-wise how this was done or why it was necessary?

Step 1

For this question radius= (x-1)^2 from x=0 to x=2

Step 2

We will use disk method to find the volume of the region.

Step 3

To integrate the integral we have to substitute z=x-1

W...

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