MathDB
7 | 2^{n+2} + 3^{2n+1}

Source: Polish MO Second Round 1960 p4

August 31, 2024
number theorydividesdivisible

Problem Statement

Prove that if n n is a non-negative integer, then number 2n+2+32n+1 2^{n+2} + 3^{2n+1} is divisible by 77.
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