作业帮(1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384)*128
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(1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384)*128
(1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384)*128
(1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384)*128
=1/3*128*(1+1/2+1/4+.+1/128)
=1/3*128*(2-1/128)
=85
(1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384)*128
=(1/3+1/6+1/12+1/24+1/48+1/96+1/192+（1/384+1/384）-1/384)*128
=(1/3+1/6+1/12+1/24+1/48+1/96+（1/192+1/192）-1/384)*128
=（1/3+1/3-1/384）*128
=128×2/3-128/384
=256/3-1/3
=255/3
=85
1/3-1/6-1/12-1/24 简便计算方法
1/3+1/3+1/6+1/12+1/24+1/48+1/96
计算 2/3+1/6+1/12+1/24+1/48+1/96+1/192
1/3+1/6+1/12+1/24+1/48+1/96简便计算
1/3+1/6+1/12+1/24+1/48+1/96的简便方法.
1/3-1/6-1/12-1/24-1/48-1/96
1-2/3-1/6-1/12-1/24-1/48-……1/768
1-2/3-1/6-1/12-1/24-1/48-...-1/768=?
-1/3〔-1/2(-1-x)-1/6〕-1/12=-1/24
2/1+6/1+12/1+24/1+48/1
(5/12+1/6-3/4)×(-24)
1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384=?
（1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384）×128
(1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384)*128的简便运算
(1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384)*128
（1/3+1/6+1/12+1/24+1/48+1/96+1/192+1/384）*128,简便计算,
1/3+1/6+1/12+1/24+……1/96简便计算
1/3+1/6+1/12+1/24+1/48怎么简便计算?