1. The problem statement, all variables and given/known data Calculate ∫∫f(x,y,z)DS for the given surface and function. Part of the plain x+y+z=0, contained in the cylinder x^2+y^2=1 f(x,y,z)=z^2. 2. Relevant equations ∫∫F(x,y,z)Ds=∫∫F(g(u,v)*||n(u,v)|| N= TuXTv Tu= G(u,v)(du); Tv is the same only the derivative is with respect to v 3. The attempt at a solution So, where I confused... is how to find the vector to use for G(u,v) from the cylinder and the plain. Aside from that I think I pretty much understand. Oh, and whould the upper and lower bounds be 1? Or do I use polar coordinates?