Problem A. 528. (February 2011)
A. 528. Let a, b and n be positive integers and let C be a finite set of integers. Suppose that every positive integer can be represented in the form axn+byn+c with some positive integers x, y and cC. Find the possible values of n.
(Proposed by Péter Kutas, Budapest)
Deadline expired on 10 March 2011.