Hi, I'm having a tremendous amount of difficulty with finding the radii in problems using cylindrical shells.
Here's the question: find the volume of the solid found by rotating the region bounded by the given curves:
x = y2+1, x = 2, about y = -2
I got 2 - (y2+1) for the height, which I know is correct. For the radius, though, I got 1 + y...which is incorrect. Can anyone explain how to get the right answer? Thanks!