What is the geometric meaning of ∣z−a∣=k∣z−b∣|z-a| = k|z-b|∣z−a∣=k∣z−b∣ (k>0,k≠1k>0, k \neq 1k>0,k=1)?
Circle of Apollonius
Perpendicular bisector
Ellipse
Hyperbola