已知一个组：x^3+y^3+z^3=x+y+z x^2+y^2+z^2=xyz 求x,y,z的正整数解

已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值 设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值 已知x,y,z为正整数,且满足x³-y³-z³=3xyz,x²=2(y+z),求 已知x,y,z为正整数,且满足x³-y³-z³=3xyz,x²=2(y+z),求 已知xyz适合关系式√3x+y-z-2+√2x+y-z=√x+y-2011+2011-x-y,试求xyz的值 已知3x+2y=4+z,2x+2z=6+y,问是否存在x、y、z的正整数值,使得x+y+z 已知x+y+z=0,求多项式x^3+x^2z-xyz+y^3的值 已知x,y,z都是正数,且xyz=1,求证：x^2/(y+z)+y^2/(x+z)+z^2/(x+y)≥3/2 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 方程组:x-2y+4z=0,2x+3y-3z=0...xyz不等于0,求(2x+y-z)\(2x-y+z) 已知xyz满足|3x-2y+z|+|2x+y+2z|=0（xyz不等于o）求x+y除以z 已知(x-3)的绝对值加(y-1)的2次方+(z+1)的绝对值=0,求(x-y)(y-z)(z-x)分之xyz