回複：土耳其奧賽題：有理數函數（3星）

來源: 於 2009-04-15 21:15:39 [舊帖] [給我悄悄話] 本文已被閱讀：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.