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=5,xy+yz+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
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为实数,且x+y+z=5,xy+yz+zx=3,则z的取值范围为 ______.
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xyz满足x+y+z=5,xy+yz+zx=3,求z的最大值
1.已知X,Y,Z为实数,且X+Y+Z=5,XY+YZ+ZX=3,则Z得取值范围为?
若实数x,y,z满足x²+y²+z²=1,则xy+yz+zx的取值范围
实数a.b.c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=0,xy+yz+zx=-3,求z的最大值.
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^2+y^2+z^2=1且x+y+z=0,则实数xy+yz+zx的取值范围是