The limits are wrong. It's from -1 to 2.
Find the volume of revolution when the area between and is rotated about the x-axis.
So subtract those and I got:
Using S for integral as I don't know the code for it.
Going to jump into the substitution with the anti-deriv.
Got a final answer of but my friend got a different answer of . What did I do wrong if mine is incorrect
The radii are incorrect. You are rotating the region around the x-axis. The closest point to the x-axis of the function is (0,1) and the closest point of the function is (-1,2). Therefore, the radii should be:
So, your integral should be something like this:
, from -1 to 2
Edit: Can someone verify my answer, please.