1加12加1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90加1/110等于几大神们帮帮忙有规律

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/13 03:47:57
1加12加1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90加1/110等于几大神们帮帮忙有规律

1加12加1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90加1/110等于几大神们帮帮忙有规律
1加12加1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90加1/110等于几大神们帮帮忙
有规律

1加12加1/6加1/12加1/20加1/30加1/42加1/56加1/72加1/90加1/110等于几大神们帮帮忙有规律
仔细看就会发现1/6=1/2-1/3,1/12=1/3-1/4...它们是有规律的 原式=1+12+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9+1/9-1/10+1/10-1/11=1+12+1/2-1/11=13+9/22应该看的懂吧