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How to prove that (z1+z2)/(z1-z2) is purely imaginary when |z1|=|z2| using geometrical means
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Show, by geometrical means, or otherwise, that if z1 and z2 are complex numbers such that |z1|=|z2|, then (z1+z2)/(z1-z2) is purely imaginary.
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#tickboom #highschoolmath #mathcoaching #math #mathematics