1./x-100/+/y+1/49/+/z+0.1/=0则XYZ 2.如果-XYZ
已知:(x+y)/z=(x+z)/y=(z+y)/x,且xyz不等于0,则分式(x+y)(x+z)(z+x)/xyz的值
xyz>0则|x|/x+x/|y|+|z|/z
已知xyz,满足x+y+z=0,xyz+8则,x分之1+y分之1+z分之1的值是
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
先化简再求值3xyz+2(x^2y+y^2z-xyz)-xyz+2z^2x x=1 y= -1 z=2
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?
x+y+z=1 求xyz/(x+y)(y+z)(z+x)的最大值
以知x+y-z/z=x-y+z/y=-x+y+z/x且xyz不等于0,则(x+y)(y+x)(z+x)/xyz=
如果x/2=y/3=z/5,且xyz不等于0,则(x+y+z)/(3x-y),
若实数xyz满足(x-z)²-4(x-y)(y-z)=0,则xyz之间的关系是怎样的
若xyz满足条件:(√x)+(√y-1)+(√z-2)=1/4(x+y+z+9),则xyz等于