已知实数x ,y,z满足√(x-2012)+|y-2012|+z²+14z=-49 求x+y+z的立方根

已知实数x ,y,z满足√(x-2012)+|y-2012|+z²+14z=-49 求x+y+z的立方根 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x+y+z=7, 已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z 已知实数xyz满足|x-2y|+2√(2y+z)+z-2z+1=0,求x+y+z的值 当x+y+z不等于零,求(x+y)/z的值,并写出一组满足条件的x,y,z的数值.已知x,y,z为实数,x/(y+z)=y/(z+x)=z/(x+y). 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=6-y,z^2=xy-9,求证：x=y 已知实数x,y,z满足x=6-y,z²=xy-9,求证：x=y 已知实数x,y,z满足x+y=6,z的平方=xy-9,求证x=y 已知实数x,y满足x-y 已知实数X,Y满足{|x+y| 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 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x,y,z均为实数,且满足:x+2y-z=6,x-y+2z=3.求x+y+z的最小值 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