Y by
Could someone please solve this problem?
Find all functions
that satisfy
and
for all integers
.
Find all functions


![\[
f(f(n)) = f(f(n+2)+2) = n
\]](http://latex.artofproblemsolving.com/4/d/8/4d8d7420e51a7529996473badd8a4e9976c2f01a.png)

This post has been edited 2 times. Last edited by dimi07, Apr 21, 2025, 12:29 PM
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