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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/18 02:16:53
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1/2009—1/2010+1/2008-1/2009+1/2007-1/2008+1/2006-1/2007+1/2005-1/2006+...+1
1/2009—1/2010+1/2008-1/2009+1/2007-1/2008+1/2006-1/2007+1/2005-1/2006+...+1

1/2009—1/2010+1/2008-1/2009+1/2007-1/2008+1/2006-1/2007+1/2005-1/2006+...+1
1/2009—1/2010+1/2008-1/2009+1/2007-1/2008+1/2006-1/2007+1/2005-1/2006+...+1/4-1/5+1/3-1/4+1/2-1/3+1
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