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It is given that complex numbers z(1) an...

It is given that complex numbers `z_(1)` and `z_(2)` satisfy `|z_(1) |=2` and `|z_(2)|=3`. If the included angle.of their corresponding vectors is `60^(circ)` then `|(z_(1)+z_(2))/(z_(1)-z_(2))|` can be expressed on `(sqrt(N))/(7)` where `N` is natural number then `N` equals

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