回复：土耳其奥赛题：有理数函数（3星）

来源: 于 2009-04-15 21:15:39 [旧帖] [给我悄悄话] 本文已被阅读：次

any rational number can be expressed as m/n with the greatest common divisor gcd(m,n)=1 or n=1 or m=1. then
f(m/n) = (m+n)/2.