算式简算
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/02 04:26:19
算式简算
算式简算
算式简算
=1-1/2+1/2-1/3+1/3-1/4+……+1/19-1/20
=1-1/20
=19/20
=1/1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+……+1/18-1/19+1/19-1/20
=1/1-1/20
=19/20
=1-1/2+1/2-1/3+1/3-1/4+……+1/19-1/20
=1-1/20
=19/20