实数x,y,z, 若x^3+y^2=3, y^2+z^2=5, z^2+x^3=4, 则xy+yz+zx的最小值是

已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 xyz是正实数,求证：x/（y+z）+y/（z+x）+z/（x+y）>=3/2 已知实数xyz满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3求x+y+z的值 若实数x,y,z满足x+y+z=4[√(x-5)+√(y-4)+√(z-3)]求x,y,z的值 已知实数x,y,z满足x+y+z=2根号x-1+2根号y-1+2根号z-1求X+2Y+3Z 已知实数x,y,z满足关系式2x-3y-z=0,x-2y+z=0,求x比y比z的值 已知实数 x y z 满足x+y-z=0 ,3x-y+2z=0 则x :y :z 若x+y+z=3y=2z,则x/x+y+z=? 若实数x≥2,y≥2,x+y≤6,则z=x+3y的最大值 若实数X.Y.Z满足Y+Z=3X^2-4X+6 Y-Z=X^2-4X+4确定XYZ大若实数X.Y.Z满足Y+Z=3X^2-4X+6 Y-Z=X^2-4X+4.试确定XYZ大小关系 若x,y,z都是正实数,且x^2+y^2+z^2=1,求证yz/x+xz/y+xy/z>=根号3 若实数X,Y,Z满足X+2Y+3Z=14,则X^2+Y^2+Z^2的最小值是多少? 若实数x,y,z满足x+y-z=1,试求x^2+3y^2+2z^2的最小值 若实数X,Y满足{ x-y-1≤0,x+y-3≤0,x≥1,则函数z=2x-y的最大值 已知实数x,y,z满足x+y+z=1,x^2+y^2+z^2=1/2求X,Y,Z∈{0,2/3},已知实数x,y,z满足x+y+z=1,x^2+y^2+z^2=1/2求证X,Y,Z∈{0,2/3}, 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z