1x1/2 2x1/3 3x1/4 ……2005x1/2006 2006x1/2007
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 06:01:11
![1x1/2 2x1/3 3x1/4 ……2005x1/2006 2006x1/2007](/uploads/image/z/3955164-60-4.jpg?t=1x1%2F2+2x1%2F3+3x1%2F4+%E2%80%A6%E2%80%A62005x1%2F2006+2006x1%2F2007)
1x1/2 2x1/3 3x1/4 ……2005x1/2006 2006x1/2007
1x1/2 2x1/3 3x1/4 ……2005x1/2006 2006x1/2007
1x1/2 2x1/3 3x1/4 ……2005x1/2006 2006x1/2007
(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5).+(1/2005-1/2006)=1-1/2006=2005/2006