1/(11×12)+1/(12×13)+……+1/(2009×2010)=

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/04 13:41:53
1/(11×12)+1/(12×13)+……+1/(2009×2010)=

1/(11×12)+1/(12×13)+……+1/(2009×2010)=
1/(11×12)+1/(12×13)+……+1/(2009×2010)=

1/(11×12)+1/(12×13)+……+1/(2009×2010)=
原式=1/11-1/12+1/12-1/13+.+1/2009-1/2010
=1/11-1/2010