|1/2011-1/2010|+|1/2011-1/2009|+|1/2009-1/2008|+...+|1/3-1/2|+|1/2-1|
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 13:03:57
![|1/2011-1/2010|+|1/2011-1/2009|+|1/2009-1/2008|+...+|1/3-1/2|+|1/2-1|](/uploads/image/z/245180-20-0.jpg?t=%7C1%2F2011-1%2F2010%7C%2B%7C1%2F2011-1%2F2009%7C%2B%7C1%2F2009-1%2F2008%7C%2B...%2B%7C1%2F3-1%2F2%7C%2B%7C1%2F2-1%7C)
|1/2011-1/2010|+|1/2011-1/2009|+|1/2009-1/2008|+...+|1/3-1/2|+|1/2-1|
|1/2011-1/2010|+|1/2011-1/2009|+|1/2009-1/2008|+...+|1/3-1/2|+|1/2-1|
|1/2011-1/2010|+|1/2011-1/2009|+|1/2009-1/2008|+...+|1/3-1/2|+|1/2-1|
|1/2011-1/2010|+|1/2011-1/2009|+|1/2009-1/2008|+...+|1/3-1/2|+|1/2-1|
=1-1/2+1/2-1/3+1/3-1/4+……+1/2010-1/2011
=1-1/2011
=2010/2011