IMO Shortlist 2005 problem N7


Kvaliteta:
  Avg: 3.0
Težina:
  Avg: 9.0
Dodao/la: arhiva
April 2, 2012
LaTeX PDF
Let P(x)=a_{n}x^{n}+a_{n-1}x^{n-1}+\ldots+a_{0}, where a_{0},\ldots,a_{n} are integers, a_{n}>0, n\geq 2. Prove that there exists a positive integer m such that P(m!) is a composite number.
Source: Međunarodna matematička olimpijada, shortlist 2005