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For any two complex number z(1) and z(2)...

For any two complex number `z_(1) and z_(2)`, such that `|z_(1)| = |z_(2)| = 1 and z_(1) z_(2) ne -1`, then show that `(z_(1) + z_(2))/(1 + z_(1)z_(2))` is real number.

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The correct Answer is:
Since `z=barz` , it is a real number.
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