若x+y+z不等于0且2y+z/x=2x+y/z=2z+x/y=k,k=?
若x+y+z不等于0且2y+z/x=2x+y/z=2z+x/y=k,k=?
若x+y+z不等于0 且 2y+z/x=2x+y/z=2z+x/y=k
已知x+y+z不等于0,若2y+z/x=2x+y/z=2z+x/y=k,则k=
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
若xy-z不等于0,且(y+x)/x=(z+x)/y=(y+x)/z,求[(y+z)(z+x)(x+y)]/xyz的值?
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
若xyz不等于0,且(y+z)/x=(z+x)/y=(x+y)/z,求(y+z)(z+x)(x+y)/xyz的值?
已知xyz不等于0,且x+2y-z=0,7x-y-z=0,求x+y+z/2x-y-z的值.
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
(2x+y)/z=(2y+z)/x=(2z+x)/7=k,求k