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Questions  

If |ω|=1 , then the set of points z=ω+1ω is satisfies

a
|Re⁡(z)|≤2
b
|z|≤1
c
|z|=1
d
|Im⁡(z)|≥2

detailed solution

Correct option is A

As |ω|=1⇒|ω|2=1⇒ωω¯=1⇒1ω=ω¯Thus, z=ω+1/ω=ω+ω¯=2Re⁡(ω)Now,  |Re⁡(z)|=|2Re⁡(ω)|=|2Re⁡(ω)|≤2|ω|=2

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