Integrating to find the volume of a finite region

james525
Messages
1
Reaction score
0
Find the volume of the finite region enclosed by the surfaces z = 0 and
x2 + y2 + z = 1

I know I have to do triple integration on dV to accomplish this but do not know where to start and what limits to use for x, y and z?

Cheers guys
 
Last edited:
Physics news on Phys.org
welcome to pf!

hi james! welcome to pf! :smile:

(try using the X2 icon just above the Reply box :wink:)
james525 said:
I know I have to do triple integration on dV to accomplish this but do not know where to start and what limits to use for x, y and z?

no, it's symmetric, so you can get away with a single integration! :wink:

first sketch the region (so that you know what it looks like), then slice it into very thin slices whose area you already know :smile:
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
Back
Top