composition of sets of form 2^{2^n}+1 and 6^{2^n}+1 is finite
Source: 2006 VMEO III Shortlist SL N11 Vietnamese Mathematics e - Olympiad https://artofproblemsolving.com/community/c2461015_vmeo__vie
October 28, 2021
number theorypowers
Problem Statement
Prove that the composition of the sets of one of the following two forms is finite:
(a)
(b)