MathDB
Krazy equality

Source: Philippine Mathematical Olympiad 2020/2

January 19, 2020
algebraPMO

Problem Statement

Determine all positive integers kk for which there exist positive integers rr and ss that satisfy the equation (k26k+11)r1=(2k7)s.(k^2-6k+11)^{r-1}=(2k-7)^{s}.