2/1+6/1+12/1+20/1+30/1+42/1+.+9900/16/1=6/3-6/2=2/1-3/1 2/1=3/1+6/1
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/29 07:52:47
2/1+6/1+12/1+20/1+30/1+42/1+.+9900/16/1=6/3-6/2=2/1-3/1 2/1=3/1+6/1
2/1+6/1+12/1+20/1+30/1+42/1+.+9900/1
6/1=6/3-6/2=2/1-3/1 2/1=3/1+6/1
2/1+6/1+12/1+20/1+30/1+42/1+.+9900/16/1=6/3-6/2=2/1-3/1 2/1=3/1+6/1
呃 拜托,是1/2+1/6+1/12+1/20+1/30+……+1/9900好吧.回答问题一也分没有啊
裂项相消法
原式=1/(1*2)+1/(2*3)+1/(3*4)+.+1/(99*100)
=(1/1-1/2)+(1/2-1/3)+(1/3-1/4)+.+(1/99-1/100)
=1-1/2+1/2-1/3+1/3-1/4+.+1/99-1/100
=1-1/100
=99/100
2%1+6%1+12%1+20%1+30%1
1/2+1/6+1/12+1/20+1/30
1/2,-1/6,1/12,-1/20,1/30
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+1/2+1/12+1/6+1/20+1/30+1/40+1/56
1+1/2+1/6+1/12+1/20+1/30.+1/901+1/2+1/6+1/12+1/20+1/30+.+1/90简便计算
1/2+1/6+1/12+1/20+1/30+1/42+1/56 简算
1/2+1/6+1/12+1/20+1/30+1/42+1/56简算,
简便运算:1/2+1/6+1/12+1/20+1/30+1/42+1/56
1+1/2+1/6+1/12+1/20+1/30+1/42的简便计算
2/1+6/1+12/1+20/1+30/1+42/1+56/1=?
1/2 - 1/6 - 1/12 - 1/20 - 1/30 - 1/42 - 1/56怎么算
1/2+1/6+1/12+1/20+1/30+.1/380+1/420=
1+1/2+1/6+1/12+1/20+1/30+1/42=?
1/2+1/6+1/12+1/20+1/30+1/42+1/56
1/2-1/6-1/12-1/20-1/30-1/42-1/56等于多少
2/1+6/1+12/1+20/1+30/1+42/1+56/1=