1.

The locus represented by |z - 1| = |z + i| is:

A. a circle of radius 1
B. an ellipse with foci at (1, 0) and (0, -1)
C. a straight line through the origin
D. a circle on the line joining (1, 0), (0, 1) as diameter
Answer» D. a circle on the line joining (1, 0), (0, 1) as diameter


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