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Regular Member
 加入日期: Feb 2003
文章: 66
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Mathematica:
1. Sum[1/Sum[s, {s, 1, k}], {k, 1, 100}] 200/101 2. Sum[1/(k(k + 1)(k + 2)), {k, 1, 98}] 4949/19800 此文章於 2004-11-06 08:10 PM 被 satai 編輯. |
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2004-11-06, 08:07 PM
#21
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Power Member
 
加入日期: Mar 2002
文章: 533
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國中有sigma......-_-
不知道該說現在的國中生很聰明還是很可憐......
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http://www.wieistmeineip.de/ip-address/ |
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2004-11-06, 09:28 PM
#22
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