若x+y+z=6,xy+yz+zx=11,xyz=6,则x/yz+y/zx+z/xy=
若x+y+z=6,xy+yz+zx=11,x^3+y^3+z^3-3xyz
xy+yz+zx=1,求x√yz+y√zx+z√xy
x+y分之xy=5,y+z分之yz=2分之7,z+x分之zx=4,则xy+yz+zx分之xyz=?
XYZ满足XY/X+Y=-2,YZ/Y+Z=3/4,ZX/Z+X=-4/3,求XYZ/XY+YZ+ZX的值
xy+yz+zx=1,x,y,z>=0
若x^2y+xy^2+y^2z+yz^2+z^2x+zx^2+3xyz=k(x+y+z)*(xy+yz+zx),则k的值
正实数x,y,z满足9xyz+xy+yz+zx=4,求证:
已知三个数x,y,z,满足xy/x+y=-2,yz/y+z=4/3,zx/z+x=-4/3,求(xyz)/(xy+yz+
设xyz是实数,若xy+yz+zx=1,则x+y+z的取值范围是
已知x,y,z都是正数,且xyz=1,求证:xy(x+y)+yz(y+z)+zx(z+x)》6
分解因式:xyz-yz-zx-xy+x+y+z-1
已知三个数x,y,z.满足xy/x十y=一2,yz/y十z=4/3,zx/z十x=一4/3则xyz/xy十yz十zx的值