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
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
若实数x,y,z满足x²+y²+z²=1,则xy+yz+zx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
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是实数,且x+y+z=5,xy+yz+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 ______.
若实数x、y、z满足x2+y2+z2=1,则xy+yz+zx的取值范围是( )
已知实数x,y,z满足x+y+z=5,xy+yz+zx=3.求z的取值范围
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?
已知 x y z都是正数 且xy+yz+zx=1 则x+y+z的最小值是
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,则z的最大值是( )