若X,Y,Z满足(Y+Z)/X=(Z+X)/Y=(X+Y)/Z=k求K的值
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若xyz不等于0,且满足(y+z)/x=(x+z)/y=(x+y)/z,求(y+z)(x+z)(x+y)/xyz的值
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(x+y-z)(x-y+z)=
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X+Y+Z=?
x/y=(x+z)/(y+z)y/z=(x+y)/(x+z)
若x、y、z满足 y+z/x = z+x/y = x+y/z =k,求k值
若x,y,z满足x分之y+z=y分之z+x=z分之x+y=k,求k的值.
若x、y、z满足x分之y+z=y分之z+x=z分之x+y=k,求k的值
若x、y、z满足 y+z/x=z+x/y=x+y/z=k 求k的值