已知实数x y z 满足x+y+z=5,xy+yz+xz=3求z的取值范围
已知实数x y z 满足x+y+z=5,xy+yz+xz=3求z的取值范围
已知x、y、z为实数,且x+y+z=5,xy+yz+xz=3,求z的取值范围.
若实数x,y,z满足x+y+z=5,xy+yz+xz=3,求z的最大值
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xy/x+y=2,xz/x+z=3,yz/y+z=4 求7x+5y-2z的值
已知x.y.z均为实数且满足x+y+z=4.求xy+yz+xz的最大值.
实数xyz满足x+y+z=5,xy+xz+zx=3.求Z的取值范围
已知x,y,z是实数,且x+y+z=5,xy+yz+zx=3,求z的取值范围
设x y z为实数,满足x+y+z=5,xy+yz+xz=3,求z的最小值
已知X+Y+Z=a,XY+YZ+XZ=b,求X*X+Y*Y+Z*Z的值
X+Y+Z=5,XY+XZ+YZ=3求Z范围
已知x,y,z为实数,且x+y+z=5,xy+yz+zx=3,则z的取值范围为 ______.