已知x2+y2+z2-xy-yz-xz=0,求证x=y=z
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已知x2+y2+z2-xy-yz-xz=0,求证x=y=z已知x2+y2+z2-xy-yz-xz=0,求证x=y=z已知x2+y2+z2-xy-yz-xz=0,求证x=y=zx^2+y^2+z^2-x
已知x2+y2+z2-xy-yz-xz=0,求证x=y=z
已知x2+y2+z2-xy-yz-xz=0,求证x=y=z
已知x2+y2+z2-xy-yz-xz=0,求证x=y=z
x^2+y^2+z^2-xy-xz-yz=0
2x^2+2y^2+2z^2-2xy-2xz-2yz=0
(x^2-2xy+y^2)+(y^2-2yz+z^2)+(x^2-2xz+z^2)=0
(x-y)^2+(y-z)^2+(x-z)^2=0
x=y=z
已知x2+y2+z2-xy-yz-xz=0,求证x=y=z
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已知:x/2=y/3=z/4,求(x2+y2-z2-2xy)/(x2-y2+z2-2xz)除以(x2-y2-z2+2yz)/(x2+y2-z2+2xy)
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