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

已知实数x,y,z满足2｜x-y｜+√2y+z+z2-z+1/4=0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 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：|4x-4y+1| + 1/3根号2y+z +z的平方- z + 1/4 = 0,求(y＋z)乘x平方 的值．：(1)(2)(3)(4) 已知实数X.Y.Z满足(Y+Z)分之X+(Z+X)分之Y+(X+Y)分之Z=1,则(Y+Z)分之X平方+(Z+X)分之Y平方+(X+Y)分之Z平方的值为（ ） 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 已知实数,x、y、z满足x+y+z=1,求x²+4y²+9z²的最小值 已知实数X,Y,Z满足X+2Y+Z=1,求X^2+4Y^2+Z^2的最小值 已知非负实数x,y,z满足x+y+z=3 (2),求证x^2/(1+x^4)+y^2/(1+y^4)+z^2/(1+z^4)≤1/(1+x)+1/(1+y)+1/(1+z) 已知实数x,y,z满足4x^2/1+4x^2=y,4y^2/1+4y^2=z,4z^2/1+4z^2=x,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 已知三个实数x,y,z满足条件(z-x)^2-4(x-y)(y-z)=0,求证:x,y,z成等差数列 已知三个实数x,y,z满足(z-x)平方-4(x-y)(y-z)=0.求证x,y,z成等差数列 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 实数x、y、z同时满足x^3+y=3x+4;2y^3+z=6y+6;3z^3+x=9z+8设实数x、y、z同时满足x^3＋y＝3x＋4；2y^3＋z＝6y＋6；3z^3＋x＝9z＋8,试求2009(x-1)^2＋2010（y-1）^2+2011(z-1)^2的值 已知复数z=x+yi,实数x,y满足x≥1,y≤2,x-y≤1,则|z-4|的最小值是 已知实数X,Y,Z,满足X^2-2X+Y=Z-1,且X+Y^2+1=0,试比较X,Y,Z的大小. 已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围