已知x+1/y=y+1/z=z+1/x,求证y/x+z/y+x/z=3
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已知x+1/y=y+1/z=z+1/x,求证y/x+z/y+x/z=3
已知x+1/y=y+1/z=z+1/x,求证y/x+z/y+x/z=3
已知x+1/y=y+1/z=z+1/x,求证y/x+z/y+x/z=3
设x+1/y=y+1/z=z+1/x=t,解得y=1/(t-x)
z=(t-x)/(t^2-tx-1)
代入z+1/x=t整理得t=1或-1
代入y/x+z/y+x/z=3x/x=3
设x+1/y=y+1/z=z+1/x=k解得y=1/(k-x)
z=(k-x)/(k^2-kx-1)
代入z+1/x=k整理得k=1或-1
代入y/x+z/y+x/z=3x/x=3
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