- #1
hvidales
- 29
- 0
Homework Statement
y=x^(3) +1, x=1, y=1; rotated about x=-1
Homework Equations
Washer Method. Pi * Integral from a to b of [Outer radius]^2-[inner radius]^2
The Attempt at a Solution
I understand the shell method version but I wanted to learn the washer way for this one.
Pi* Integral from 1 to 2 of (1+1)^(2)-[1+(y-1)^(1/3)]^(2) dy.
I am sure this is the wrong way to set it up because I get like pi lol. The answer should be 9pi/10. Like I said I know how to do this through the shells but not the washer. I also do not know how one can see that the shells would be easier to use. Thanks for the help!