w=[m]\frac{2z+1}{z-i-1}[/m]
wz-wi-w=2z+1
wz-2z=1+wi+w
z(w-2)=w+1+wi
z=[m]\frac{w+1+wi}{w-2}[/m]
z=[m]\frac{w+1}{w-2}+\frac{w}{w-2}i[/m]
Rez=Imz
⇒
[m]\frac{w+1}{w-2}=\frac{w}{w-2}[/m] ⇒
[m]w=2[/m]
[m]x+iy=2[/m] ⇒ [m]x=2[/m]; [m]y=0[/m]
О т в е т. Прямая