联立求解下列三元方程请把过程写清楚,xy+2λ(y+x)=0xz+2λ(x+z)=0yz+2λ(y+z)=02xy+2x

联立求解下列三元方程请把过程写清楚,xy+2λ(y+x)=0xz+2λ(x+z)=0yz+2λ(y+z)=02xy+2x (2X+Z-Y)/(X^2-XY+XZ-YZ)-(Y-Z)/(X^2-XY-XZ+YZ) 已知x+y+z=1,xy+yz+xz=0,求x^2+y^2+z^2的值. 已知x^2+y^2+z^2-xy-yz-xz=0,求x,y,z 的大小关系 设x,y,z∈R+,xy+yz+xz=1,证明不等式:(xy)^2/z+(xz)^2/y+(yz)^2/x+6xyz≥x x+3y+7z=0 2x+5y+11z=0,求(x^2+y^2+z^2)/(xy+2yz+3xz) 求(2X+Z-Y)/(X^2-XY+XZ-YZ)-(2X+Y+Z)/(X^2+XY+XZ+YZ) 若x,y,z>0 则根号(x^2+y^2+xy)+根号(y^2+z^2=yz)>根号(x^2+z^2+xz) 1.已知3x-4y-z=0,2x+y-8z=0.求x²+y²+z²/xy+yz+2xz 的 已知4x-5y+2z=0,x+4y-3z=0,求(x²+y²+z²)/xy+yz+xz x^2+y^2+xy=25/4,x^2+z^2+xz=169/4,y^2+z^2+yz=36,求xy+xz+yz 请说明:若X^2 + 2Y^2 + Z^2=XY-YZ-XZ,且XYZ不等于0,则X=Y=-Z