2+3+4+。。。m = 2^(n-1)
2+2+3+4+5+6+7+8+9+10+11+12+13+14 。。。。。。
m = 90, 2^(n-1) = 4096
怎么证明后面有解、还是没解?
可以转换成另外一种形式
所有跟帖:
• Yes, m=90, n=13 is a solution. -tieddog- ♂ (270 bytes) () 01/23/2014 postreply 18:49:41
• 没别的解了,就这5个解 -怪哉- ♂ (79 bytes) () 01/23/2014 postreply 19:00:47
• Any link? -tieddog- ♂ (0 bytes) () 01/23/2014 postreply 19:13:25
• en.wikipedia.org/wiki/Ramanujan%E2%80%93Nagell_equation -怪哉- ♂ (404 bytes) () 01/23/2014 postreply 19:27:29
• Thanks. It is a famous one. -tieddog- ♂ (0 bytes) () 01/23/2014 postreply 19:28:43
• 原来这么著名啊 -ca981- ♂ (0 bytes) () 01/23/2014 postreply 19:43:15
• 所以tieddog说hard是有道理的 -怪哉- ♂ (173 bytes) () 01/23/2014 postreply 19:49:59
• 怪哉读题不认真。比五个解多得多 -calimass- ♂ (135 bytes) () 01/23/2014 postreply 19:49:57
• 晕 -怪哉- ♂ (20 bytes) () 01/23/2014 postreply 19:52:10
• Yes,m can be negative. -tieddog- ♂ (0 bytes) () 01/23/2014 postreply 19:58:36