(2007-1)+(2006-2)+(2005-3)+...+(1005-1003)
送分
(2007-1)+(2006-2)+(2005-3)+...+(1005-1003)
2007-04-30 3:20 am
回答 (4)
2007-04-30 5:55 am
✔ 最佳答案
項:(2006-2)/2+1
=2004/2+1
=1002+1
=1003
答:
(2007-1)+(2006-2)+(2005-3)+......+(1005-1003)
=2006+2004+2002+......+2
=(2006+2)x1003/2
=2008x1003/2
=2014024/2
=1007012
2007-05-01 9:23 pm
=2006+2004+2002+...+2
=(2006+2)x項數
項數的計法：
2006+2/2
=1004
=2016032
=(2006+2)x項數
項數的計法：
2006+2/2
=1004
=2016032
收錄日期: 2021-04-29 18:54:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070429000051KK04596