已知实数x,y,z满足:x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,则x+y+z=
已知实数x,y,z满足:x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,则x+y+z=
已知实数x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求x2/(y+z)+y2/(z+x)+z2/(
已知实数 x y z 满足x+y-z=0 ,3x-y+2z=0 则x :y :z
已知实数x,y,z满足丨4x-4y=1丨=1/3(根号2y+z)+z平方-z+1/4=0.求(y+z)×x的平方的值
已知x,y,z为实数,满足x+2y-z=6x-y+2z=3
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
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x+1/y=Y+1/Z=1,(1)求z+1/x的值 (2)如果实数x,y,z.满足x+1/y=4,y+1/z=1,z
已知x,y,z属于R+(正实数),且xyz(x+y+z)=4+2*根号下3,则(x+y)(y+z)的最小值是?
x分之y+z=y分之z+x=z分之x+y(x+y+z不等于0),求x+y+z分之x+y-z
已知x,y,z满足{4x-3y-3z=0,x-3y+z=0.(x不等于0,y不等于0,z不等于0)求x/z和y/z的值
已知x+y=3,y+z=4,x+z=5,则x+y+z等于( )