IMO Shortlist 1967 problem 1


Kvaliteta:
  Avg: 0.0
Težina:
  Avg: 0.0
Dodao/la: arhiva
April 2, 2012
LaTeX PDF
Prove that all numbers of the sequence \frac{107811}{3}, \quad \frac{110778111}{3}, \frac{111077781111}{3}, \quad \ldots are exact cubes.
Source: Međunarodna matematička olimpijada, shortlist 1967