送交者: Zzz 于 2011-03-04, 16:13:39:

回答: you remove the first 1 from the sum and get a negative sum. 由 suprathinker 于 2011-03-04, 15:18:18:

• 1-1+1-1+，，，，=1/2---》-1+1-1+1+，，，，=-1/2 (无内容) - 3747 (0 bytes) 2011-03-04, 16:16:08 (555922)
  • u already got it. he needs more time. (无内容) - suprathinker (0 bytes) 2011-03-04, 17:00:49 (555937)
  • 我不明白他贴的这些的实际意义，只是尽量按他的思路去理解 (无内容) - 3747 (0 bytes) 2011-03-04, 16:47:49 (555934)
  • 你用＂定理＂证明推论，进而连＂定理＂本身也接受了？ (无内容) - Zzz (0 bytes) 2011-03-04, 16:42:45 (555932)

加跟贴