1/2+1/6+1/12+1/20+1/30+1/42 怎么简便计算..
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/24 04:26:31
1/2+1/6+1/12+1/20+1/30+1/42怎么简便计算..1/2+1/6+1/12+1/20+1/30+1/42怎么简便计算..1/2+1/6+1/12+1/20+1/30+1/42怎么简
1/2+1/6+1/12+1/20+1/30+1/42 怎么简便计算..
1/2+1/6+1/12+1/20+1/30+1/42 怎么简便计算..
1/2+1/6+1/12+1/20+1/30+1/42 怎么简便计算..
原式=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(裂项相消)