1/12+1/20+1/30+1/42+1/56最终等于几?
来源:百度知道 编辑:UC知道 时间:2024/06/03 12:38:18
不需要过程,只要答案。
1/12+1/20+1/30+1/42+1/56
=1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8
+1/4可以和-1/4抵消,按此计算,只剩下1/3-1/8
通分后为8/24-3/24=5/24
所以答案为5/24
1/3-1/8=5/24
5/24
5/24
5/24
是不是无限多项?
如果是,最终等于1/3
道理跟6楼的一样
1/8=1/( )+1/( )1 1/10=1/( )+1/( )1/12=1/( )+1/( )+1/( )
1/2+1/6+1/12+1/20+1/30
1/6+1/8+1/10+1/12+..........+1/202=?
1/12+1/20+1/42+1/56+...+1/210=?
1/11+1/12+1/13+1/14+1/15=?
-1/2-1/6-1/12-1/20-``````````````-1/4026042
1/2+1/6+1/12+......+1/1980+1/2070=?
1/12+1/20+1/30+1/42+1/56=??
一:1/8=1/( )+1/( )二:1/10=1/( )+1/( )三:1/12=1/( )+1/( )+1/( )
((1+D14)^(1/12))-1