1/6+1/24+1/60+1/120+1/210+1/336=?
1/6+1/24+1/60+1/120+1/210+1/336=?
数学人气：873 ℃时间：2020-03-19 21:00:47
优质解答
使用列项相消法6*7*8=3365*6*7=2104*5*6=1203*4*5=602*3*4=241*2*3=61/(1*2*3)=(1/(1*2)-1/(2*3))/21/(2*3*4)=(1/(2*3)-1/(3*4))/2……原式=(1/(1*2)-1/(7*8))/2=(1/2-1/56)/2=7/112
我来回答
类似推荐
猜你喜欢
- 1过n边形的一个顶点的对角线可以把n边形分成_个三角形．（用含n的式子表示）．
- 21.看到生机勃勃的春天你会想起（）
- 3英语时间的两种表达方式
- 4the police were told that some boys were seen_ on the street
- 5如图，已知AB=AC，AD=AE．求证：BD=CE．
- 6Another day and another week..Good Weather,Good Mood英文意思
- 7英语翻译
- 8翻译 1.学生们应该彼此相处融洽 students should_____each other 2.我的梦想是周游世界 my dream is to—
- 9Jane,come here.Do you know how to ____ the coffee machine?A.control B work C manage D try
- 10可以给描写春水、春风、春雨的古诗名句各一条吗?