已知x,y,z满足xyz=1,求证x^3/(x+y)+y^3/(y+z)+z^3/(z+x)大于等于3
已知x,y,z满足xyz=1,求证x^3/(x+y)+y^3/(y+z)+z^3/(z+x)大于等于3
已知xyz属于R+,x+y+z=1,求证x^3/(y(1-y))+y^3/(z(1-z))+z^3/(x(1-x))大于
已知x,y,z 大于0,x+y+z=2,求证 xz/y(y+z)+zy/x(x+y)+yx/z(z+x)大于等于2/3
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
非零实数xyz,满足x+y+z=xyz,x平方=yz,求证x平方大于等于3
已知X,Y,Z为3个互不相等的实数,且X+1/Y=Y+1/Z=Z+1/Z求证(xyz)^2=1
已知x,y,z是实数,且xyz=1,求证x^2+y^2+z^2+3大于等于2(xy+xz+yz)
已知非零实数xyz,满足x+y+z=xyz,x^2=yz,求证x^2大于等于3
已知实数XYZ满足3X-y-3Z=0和X-6Y+6Z=0(Z不等于0),则代数式X+Y+Z/x-Y+Z的值等于
已知3x+4y+5z=1求证X^2+y^2+z^2大于等于1/50
已知实数x、y、z满足x+1/y=4,y+1/z=1,z+1/x=7/3,求xyz的值
已知xyz满足|3x-2y+z|+|2x+y+2z|=0(xyz不等于o)求x+y除以z