若x/3=y/1=z/2,且xy+yz+zx=99,则2x^2+12y^2+9z^2=
若x/3=y/1=z/2,且xy+yz+zx=99,则2x^2+12y^2+9z^2=
若x/3=y/1=z/2,且xy+yz+zx=99,求zx平方+9y平方+9z平方的值?
若x/3=y/2=z/5,且xy+yz+zx=93,求9x*x+12y*y+2z*z的值.
若x/3=y/1=z/2,且xy+yz+zx=99,那麽2x^2+12y^2+9z^2=?
若x:y:z=3:1:2,且zx-xy-yz=99,求2x^2+12y^2+9z^2的值
已知xy:yz:zx=3:2:1,求①x:y:z ②x/yz:y/zx
已知x/3=y/1=z/2,且xy+yz+zx=99,求;2X平方+12y平方+9z平方的值.
已知x/3=y/1=z/2,且xy+yz+zx=99,求2x²+12y²+9z²的值
若3/x=2/y=5/z则xy+yz+zx/x^2+y^2+z^2=?
若x/3=y/2=z/5,且xy+yz+zx=93,求9x²+12y²+2z²的值.
已知xy/x+y=3,yz/y+z=2,zx/z+x=1,求y的值
X+Y/XY=1,Y+Z/YZ=2,Z+X/ZX=3 求X的值