设V为曲面x+y+z=1,x=0,y=0,z=0所界定区域,则∫∫∫(V)1/(1+x+y+z)^3dxdydz

问题描述:

设V为曲面x+y+z=1,x=0,y=0,z=0所界定区域,则∫∫∫(V)1/(1+x+y+z)^3dxdydz