1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90等于

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/24 08:28:31
1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90等于1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90等于1/6加1/12加1/20加1/30加1

1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90等于
1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90等于

1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90等于
1/2-1/3+1/3-1/4……+1/9-1/10
=1/2-1/10
=2/5

2/5或0.4