/sci/ - Science & Math

[Anonymous No.4311337]

/sci/ I'm completely lost right now.

So I'm doing volumes by shells and I have:

y = x^2, x = y^2, about y = -1

so functions: y = x^2 and y = +-sqrt(x)

from x = 0 to x = 1


now my first thought is to do something like:
Integrate[ 2pi*x*(sqrt(x)-x^2), {x,0,1}]

But it's suppose to be about y = -1 and this is the confusing part for me. The about y = -1 just blows my mind apparently.


what do?

[Anonymous No.4311396]

>>4311337
you're rotating it on the wrong axis