Question

question bta do plz.
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Answer 1

Answer:

I don't understand anything.

Answer 2

Step-by-step explanation:

Given thatz1z2 is purely imginary.As no other information is given hence we can have:z1z2=ki, where k is a real number and i=−1−−−√Now∣∣z1−z2z1+z2∣∣=∣∣∣∣z1z2−1z1z2+1∣∣∣∣=∣∣ki−1ki+1∣∣=∣∣ki−1∣∣∣∣ki+1∣∣ [As ∣∣zω∣∣=∣∣z∣∣∣∣ω∣∣]=k2+(−1)2√k2+(1)2√=k2+1√k2+1√=1⇒∣∣z1−z2z1+z2∣∣=1