Difference between revisions of "1999 ELMO"
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Latest revision as of 02:36, 13 April 2007
ELMO 1999 |
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Experimental Lincoln Math Olympiad |
1. In nonisosceles triangle , let the excenters of the triangle opposite and be and respectively. Let the external angle bisector of intersect the circumcircle of triangle again at . Prove that
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