已知正实数x、y、z满足x+y+xy=8y+z+yz=15z+x+zx=35
如果实数x,y,z满足x^2+y^2+z^2-(xy+yz+zx)=8,用A表示|x-y|,|y-z|,|z-x|中的最
正实数x,y,z满足9xyz+xy+yz+zx=4,求证:
已知实数xyz满足x+y+z=5,xy+yz+zx=3,求z的最大值
已知实数x,y,z满足x+y+z=5,xy+yz+zx=3,则z的最大值是( )
已知实数x,y,z满足x+y+z=5,xy+yz+zx=3.求z的取值范围
已知:实数x,y,z满足:x+y+z=0,xy+yz+zx=-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,求(xyz)/(xy+yz+
设实数x,y,z满足x2+y2+z2-xy-yz-zx=27,则|y-z|的最大值为?
若实数x,y,z满足方程组 xy/﹙x+2y﹚=1① yz/﹙y+2z﹚=2② zx/﹙z+2x﹚③ 则
若实数x,y,z满足x²+y²+z²=1,且x+y+z≠0,则xy+yz+zx的取值范围是
急已知三个数x y z满足xy/(x+y)=-2,yz/(y+z)=4/3,zx/(z+x)=-4/3,则xyz/(xy
已知实数x,y,z满足X^2 y^2 z^2=5,则xy+yz+zx的最大值是 ,最小值是