biet rang x/y+z+1=y/x+z+1=z/x+y-2=x+y+z
tim x. y.z
Tim x,y,z biet rang: \(\frac{y+z+1}{x}=\frac{x+z+2}{y}=\frac{x+y-3}{z}=\frac{1}{x+y+z}\)
Tìm X,Y,Z biet rang X.(X+Y+Z)=-5 ; Y(X+Y+Z)=9 ; Z(X+Y+Z) =5
tim cac so x,y,z thuoc Q biet rang (x+y):(5-z):(y+z):(y+9)=3:1:2:5
tim x,y,z biet; x/z+y+1=y/x+z+1=x+y-2=x+y+z
tim x,y,z biet y+z+1=x+z+2/y=x+y-3/2=1/x+y+z
Tim x , y , z biet: x /y+z+1 = y/ z+x+2 = z/ x+y−3 =x+y+z Cach lam ho minh voi
Tim x,y,z biet
X+y+2005/z=y+z-2006/x=x+z+1/y=2/x+y+z
tim x,y,z biet
\(\frac{x}{y+z+1}=\frac{y}{z+x+1}=\frac{z}{x+y-2}=x+y+z\)
