x/3=y/2=z/5,求xy+yz+xz/x²+y²+z²
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分式题:xy=x+y,yz=2(y+z),zx=3(z+x),求xyz/(xy+yz+xz)xy=x+y,yz=2(y+z),zx=3(z+x),求xyz/(xy+yz+xz)
x/3=y/2=z/5,求xy+yz+xz/x²+y²+z²
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