Thursday, September 16, 2010
12th Balkan Mathematical Olympiad Problems 1995
12th Balkan Mathematical Olympiad Problems 1995A1. Define an by a3 = (2 + 3)/(1 + 6), an = (an-1 + n)/(1 + n an-1). Find a1995. A2. Two circles centers O and O' meet at A and B, so that OA is perpendicular to O'A. OO' meets the circles at C, E, D, F, so that the points C, O, E, D, O', F lie on the line in that order. BE meets the circle again at K and
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