1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=

来源：学生作业帮助网编辑：六六作业网时间：2024/12/19 10:56:48

1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=1/2+1/6+1/12+1/20+1/30+1

1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=