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5

Part of 1994 Turkey MO (2nd round)

Problems(1)

Turkish MO 1994 P5

Source: Turkish Mathematical Olympiad 2nd Round 1994

9/27/2006
Find the set of all ordered pairs (s,t)(s,t) of positive integers such that t2+1=s(s+1).t^{2}+1=s(s+1).
quadraticscalculusintegrationnumber theory unsolvednumber theory