MathDB
IMC 2005 day 2 pb 2

Source: Peter

July 26, 2005
functionalgebrapolynomialnumber theoryrelatively primeIMCcollege contests

Problem Statement

Let f:RRf: \mathbb{R}\to\mathbb{R} be a function such that (f(x))n(f(x))^{n} is a polynomial for every integer n2n\geq 2. Is ff also a polynomial?