1988 IMO Problems/Problem 3
Revision as of 13:22, 7 June 2019 by Mrmustache (talk | contribs)
A function is defined on the positive integers by
,
$f(4n+1) = 2f(2n+1)−f(n)$ (Error compiling LaTeX. Unknown error_msg), $f(4n+3) = 3f(2n+1)−2f(n)$ (Error compiling LaTeX. Unknown error_msg) ,
for all positive integers
.
Determine the number of positive integers
, less than or equal to
, for which
.