If (z1/z2) is purely imaginary then |(z1+z2/z1-z2)| is equal to

Question

If (z1/z2) is purely imaginary then |(z1+z2/z1-z2)| is equal to (A) 1 (B) 2 (C) 3 (D) 0

Tardigrade Admin · Accepted Answer

E =|(1+( z 1 / z 2)/( z 1 / z 2)-1)|=|(1+ x i/ x i-1)|=1

Q. If $\frac{z _{1}}{z _{2}}$ is purely imaginary then $∣ ∣ \frac{z _{1} + z _{2}}{z _{1} - z _{2}} ∣ ∣$ is equal to