olymmath

RMO 2023 K5

  • KV and JNV

The side lengths a,b,ca,b,c of a triangle ABCABC are positive integers. Let:

Tn=(a+b+c)2n−(a−b+c)2n−(a+b−c)2n+(a−b−c)2nT_{n}=(a+b+c)^{2n}-(a-b+c)^{2n}-(a+b-c)^{2n}+(a-b-c)^{2n}

for any positive integer nn . If T22T1=2023\frac{T_{2}}{2T_{1}}=2023 and a>b>ca>b>c , determine all possible perimeters of the triangle ABCABC .

Dataset text AI-MO AoPS. Quoted with source.

Official text: Indian Regional Mathematical Olympiad 2023 official paper, page 1.

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