Let z $ \in $ C with Im(z) = 10 and it satisfies ${{2z - n} \over {2z + n}}$ = 2i - 1 for some natural number n. Then :

Question

n = 20 and Re(z) = –10

n = 40 and Re(z) = 10

n = 40 and Re(z) = –10

n = 20 and Re(z) = 10

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