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Math Challenge III (AIME) Summer 2017 (Algebra)

 
 
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Re: Math Challenge III (AIME) Summer 2017 (Algebra)
by Christopher Wu - Tuesday, 11 July 2017, 11:20 AM
 

 draw the unit circle and look at all the points that a 7th root of unity could be. use the fact that for a root of unity, the conjugate of z is 1/z