MathDB
CIIM 2009 Problem 1

Source:

June 9, 2016
CIIM 2009

Problem Statement

Prove that for any positive integer nn the number (3+172)n+(3172)n\left(\frac{3+\sqrt{17}}{2}\right)^n+\left(\frac{3-\sqrt{17}}{2}\right)^n is an odd integer.