|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+.+|1/2008-1/2007|

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/16 09:34:25

|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+.+|1/2008-1/2007|

=1/2-1/3+1/3-1/4+1/4-1/5+1/2007-1/2008
=1/2-1/2008
=1003/2008