已知:(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)]/xyz的值

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已知:(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)]/xyz的值
已知:(x+y-z)/z=(x-y+z)/y=(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)]/xyz的值
题目中写错个等号,汗...

设x+y-z/z=x-y+z/y=y+z-x/x=k有x+y-z=kzx-y+z=kyy+z-x=kx三式相加得x+y+z=k(x+y+z) k=1 得x+y=(k+1)zx+z=(k+1)yy+z=(k+1)x当x+y+z≠0时(x+y)(y+z)(x+z)/xyz=(k+1)^3xyz/xyz=(k+1)^3=8当x+y+z=0时x+y=-z,x+...