已知xyz≠0,且x y z满足 3x-4y-z=0 2x+y-8z=0 (求X²+Y²+Z&sup
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)
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
已知实数X,Y,Z满足 X²-6XY+10Y²+4Y+∣Z²-3Z+2∣+4=0,求(X+
已知x,y,z为正整数,且满足x³-y³-z³=3xyz,x²=2(y+z),求
1.已知3x-4y-z=0,2x+y-8z=0.求x²+y²+z²/xy+yz+2xz 的
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
已知4x-3y-6z=0,x+2y-7z=0,xyz≠0,求2x²+3y²+6z²除以x&
已知2x+3y-5z=0,3x-2y+12z=0(z≠0),求4x²-12xy+9y²/2x&sup
已知x/3=y/4=z/6,(x,y,z≠0),求xy+yz+xz/x²+y²+z²
已知x,y,z满足条件(x-2y-4)²+(2y+z)²+丨x-4y+z丨=0,求3x+y-z的值
已知x²+y²+z²-2x+4y-6z+14=0,求代数式(x-y-z)²&or
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值