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(i)If z is a complex no. such that |z|=1...

(i)If z is a complex no. such that `|z|=1`; prove that `(z-1)/(z+1)` is purely imaginary . what will be the conclusion if z=1 (ii) Find real `theta` such that `(3+2isintheta)/(1-2isintheta)` is purely real.

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