正整数x、y、z满足x&3-y&3-z&3=3xyz,x²=0(y+z),则xy+yz+xz=()
正整数x、y、z满足x&3-y&3-z&3=3xyz,x²=0(y+z),则xy+yz+xz=()
已知x^3+y^3-z^3=96,xyz=4,x^2+y^2+z^2-xy+xz+yz=12,则x+y-z等于
x+y+z=1,x,y,z都是正数,求xy+yz+xz-3xyz的最大值和最小值
若实数x,y,z满足x+y+z=5,xy+yz+xz=3,求z的最大值
已知三个数x,y,z满足xy/x+y=-2,yz/y+z=4/3,zx/z+x=-4/3,则xyz/xy+yz+xz=
已知三个数x,y,z,满足xy/x+y=-2,yz/y+z=3/4,zx/z+x=-3/4 ,则xyz/xy+xz+yz
已知x/3=y/4=z/6,求(xy+yz+xz)/(x²+y²+z²)
xy/x+y=1 yz/y+z=2 xz/x+z=3 求xyz/x+y+z=?
已知x+y+z=3,xy+yz+xz=-1,xyz=2,求x^2y^2+y^2z^2+x^2z^2
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+
已知,xyz=0,求x/(xy+x+1)+y/(yz+y+1)+z/(xz+z+1)值?
x.y.z三个数满足xy/x+y=-2.yz/y+z=4/3,zx/z+x=负的4/3求xyz/xy+xz+yz