Question

The complex number $z = x + iy$ satisfy the equation $|\frac {z-5i}{z+5i}| = 1$ lies on

• A. the $x-axis$
• B. the straight line $y = 5$
• C. a circle passing through origin
• D. None of the above

Answer 1

Answer: (A)

the $x-axis$

Answer 2

Answer (a) the $x-axis$