IMO Shortlist 1975 problem 3
Dodao/la:
arhiva2. travnja 2012. Find the integer represented by
![\left[ \sum_{n=1}^{10^9} n^{-2/3} \right]](/media/m/6/8/4/684c8c9458d9b87753898dbd5d5ddbdb.png)
. Here
![[x]](/media/m/6/a/4/6a47dfb91475b9d5490dbb3a666604a3.png)
denotes the greatest integer less than or equal to
%V0
Find the integer represented by $\left[ \sum_{n=1}^{10^9} n^{-2/3} \right]$. Here $[x]$ denotes the greatest integer less than or equal to $x.$
Izvor: Međunarodna matematička olimpijada, shortlist 1975