若实数x,y,z满足:xy=1,yz=2,xz=3,求x,y,z的值
若实数x,y,z满足x+y+z=5,xy+yz+xz=3,求z的最大值
若实数x,y,z满足:xy=1,yz=2,xz=3,求x,y,z的值
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均为实数且满足x+y+z=4.求xy+yz+xz的最大值.
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
x-3=y-2=z-1,求x^2+y^2+z^2-xy-yz-xz的值
X,Y,Z为实数,且XY/X+Y=1/3,YZ/Y+Z=1/4,XZ/X+Z=1/5,求XYZ/XY+YZ+XZ的值
设x y z为实数,满足x+y+z=5,xy+yz+xz=3,求z的最小值
若x/2=1/y=z/3,且xy+xz+yz=99,求4x^2-2xz+3yz-9y^2的值.
若x/3=y=z/4,且xy+xz+yz=76,求2x*x+12y*y+9z*z的值
已知1=xy/x+y,2=yz/y+z,3=xz/x+z,求x+y+z的值
已知xy分之x+y=3,yz分之y+z=2,xz分之x+z=1,求x,y,z的值