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RO-NMO 2007 Problem 74

  • Grade 7

Let m,nm,n be two natural numbers with m>1m > 1 and 22m+1−n2≥02^{2m + 1} - n^2\geq 0 . Prove that: 22m+1−n2≥7.2^{2m + 1} - n^2\geq 7 .

Dataset text AI-MO AoPS. Quoted with source.

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