1 /2+1/6+1/12+1/20+1/30+1/42 用简便方法计算这道题

来源：学生作业帮助网编辑：六六作业网时间：2024/12/18 22:47:28

1/2+1/6+1/12+1/20+1/30+1/42用简便方法计算这道题1/2+1/6+1/12+1/20+1/30+1/42用简便方法计算这道题1/2+1/6+1/12+1/20+1/30+1/4

1 /2+1/6+1/12+1/20+1/30+1/42 用简便方法计算这道题
1 /2+1/6+1/12+1/20+1/30+1/42 用简便方法计算这道题

1 /2+1/6+1/12+1/20+1/30+1/42 用简便方法计算这道题
1 /2+1/6+1/12+1/20+1/30+1/42
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1-1/7
=6/7