[問題] Number Theory

看板IMO_Taiwan作者darkseer (進入無限期公假)時間19年前 (2005/02/11 22:04)推噓2(2推 0噓 1→)

留言3則, 2人參與討論串1/3 (看更多)

This problem is from AoPS. http://www.artofproblemsolving.com/Forum/viewtopic.php?t=26137 n, a, and b are natural numbers. Prove that: 1 1 1 --- + --- + ... + ---- isn't natural. a a+b a+nb By being natural, we mean that number is a positive integer. Your English may not be as poor as mine, but it takes me 5 mins to understand it orz... -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 218.175.182.32 ※ 編輯: darkseer 來自: 218.175.182.32 (02/11 22:16)

推

LPH66

61.62.178.179 02/11, , 1^F

61.62.178.179 02/11, 1^F

→

LPH66

61.62.178.179 02/11, , 2^F

61.62.178.179 02/11, 2^F

推

darkseer

218.175.187.247 02/12, , 3^F

218.175.187.247 02/12, 3^F