MathDB
p(x^3+1)=p(x+1)^3

Source: Bulgaria 1988 P6

June 15, 2021
fePolynomialsfunctional equationalgebra

Problem Statement

Find all polynomials p(x)p(x) satisfying p(x3+1)=p(x+1)3p(x^3+1)=p(x+1)^3 for all xx.