作业帮|1/3-1/2|+|1/4-1/3|~|1-2012-1/2011|急求怎样解答
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/27 13:30:57
|1/3-1/2|+|1/4-1/3|~|1-2012-1/2011|急求怎样解答
|1/3-1/2|+|1/4-1/3|~|1-2012-1/2011|急求怎样解答
|1/3-1/2|+|1/4-1/3|~|1-2012-1/2011|急求怎样解答
1/2>1/3>1/4>...>1/2011>1/2012
|1/3-1/2|+|1/4-1/3|+...+|1/2012-1/2011|
=1/2-1/3+1/3-1/4+...+1/2011-1/2012
=1/2-1/2012
=1005/2012
|1/3-1/2|+|1/4-1/3|~~|1-2012-1/2011|
=1/2-1/3+1/3-1/4+...+1/2011-1/2012
=1/2-1/2012
=1005/2012