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❓ Question Among the following statements: (S1) { z ∈ C ∖ { − i } : ∣ z ∣ = 1  and  z − i z + i  is purely real } contains exactly two elements . (…

❓ Question If the locus of z ∈ C z \in \mathbb{C} , such that Re  ⁣ ( z − 1 2 z + i ) + Re  ⁣ ( z − 1 2 z − i ) = 2 , is a circle of radius r r r…