数列

送交者: eng 于 2008-12-12, 11:35:03:

回答: 零由 eng 于 2008-12-12, 11:25:43:

1 + (-1+1) + (-1+1) + (-1+1) + ...
= 1 - 1 + 1 - 1 + 1 - 1 + 1 - 1 ....

这一步不成立。左面收敛于1，右面不收敛。故不等。

Did you really learn Real Analysis or not? - shortstop (74 bytes) 2008-12-12, 12:59:48 (283805)
- yup, that's the point. - eng (157 bytes) 2008-12-12, 19:10:20 (283877)