x ^4+y^4+z^4-2x^2 y^2-2x^2Z^2+2y^2z^2
已知x,y,z为非负实数,p=-3x+y+2z,q=x-2y+4z,x+y+z=1,求p^2+q^2的最大值
设x、y、z为整数,证明:x^4*(y-z)+y^4*(z-x)+z^4*(x-y)/(y+z)^2+(z+x)^2+(
(y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z
x,y,z正整数 x>y>z证明 x^2x +y^2y+z^2z>x^(y+z)*y^(x+z)*z^(x+y)
求解2x≥x+y+z 4y≥x+y+Z 8z≥x+y+z x、y、z均大于0
x ^4+y^4+z^4-2x^2 y^2-2x^2Z^2+2y^2z^2
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x-2z+y)(y+z-2x)+(x
已知2x-3y+z=o,3x-2y-6z=0,xyz≠0,求x^2+y^2+z^2/2x^2+y^2-z^2的值
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
(x-2y+z)(x+y-2z)分之(y-x)(z-x) + (x+y-2z)(y+z-2x)分之(z-y)(x-y)
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(xy-2z)(y+z-2x)+(x-
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)