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log_{2n-2} (n^2 + 2) is rational (IV Soros Olympiad 1997-98 R2 11.5)

Source:

June 1, 2024
number theorylogarithms

Problem Statement

Find all integers nn for which log2n2(n2+2)\log_{2n-2} (n^2 + 2) is a rational number.