〔1/2009-1/2008〕+〔1/2008-1/2007〕…〔1/3-1/2〕+〔1/2-1〕=?
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解决时间 2021-02-13 10:34
- 提问者网友:趣果有间
- 2021-02-12 22:50
要快!!!!!!!!急!急!急!急!
最佳答案
- 五星知识达人网友:杯酒困英雄
- 2021-02-13 00:19
解:
〔1/2009-1/2008〕+〔1/2008-1/2007〕…〔1/3-1/2〕+〔1/2-1〕
=1/2009-1/2008+1/2008-1/2007+...+1/3-1/2+1/2-1
=1/2009-1
=-2008/2009
〔1/2009-1/2008〕+〔1/2008-1/2007〕…〔1/3-1/2〕+〔1/2-1〕
=1/2009-1/2008+1/2008-1/2007+...+1/3-1/2+1/2-1
=1/2009-1
=-2008/2009
全部回答
- 1楼网友:深街酒徒
- 2021-02-13 03:40
括号打开啊 化简就变成
1/2009-1=-2008/2009
- 2楼网友:撞了怀
- 2021-02-13 02:01
(1/2009-1/2008〕+〔1/2008-1/2007〕…〔1/3-1/2〕+〔1/2-1〕
=-[(1/2008-1/2009)+(1/2007-1/2008)+...+(1/2-1/3)+(1-1/2)]
=-(1-1/2009)
=-2008/2009
- 3楼网友:逐風
- 2021-02-13 01:00
|1/2009-1/2008|+|1/2008-1/2007|+……+|1/3-1/2|+|1/2-1| =1/2008-1/2009+1/2007-1/2008+……+1/2-1/3+1-1/2 =1-1/2009 =2008/2009
- 4楼网友:舍身薄凉客
- 2021-02-13 00:29
〔1/2009-1/2008〕+〔1/2008-1/2007〕…〔1/3-1/2〕+〔1/2-1〕
= 1/2009-1/2008+1/2008-1/2007+…+1/3-1/2+1/2-1
= 1/2009-(1/2008-1/2008)-…-(1/2-1/2)-1
= -2008/2009
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