An astonishing way to prove a functional equation

In this video, we present a solution to Baltic Way 2023/4. 00:00 Problem Statement 00:26 Solution Check out our website https://www.calimath.org to find past problems, solutions and other cool stuff. Solution PDF: https://calimath.org/pdf/BalticWay202... branch: algebra difficulty: 10 Our website: https://www.calimath.org Contact us: calimath.business@gmail.com