1-2/3-1/6-1/12-1/24-1/48-...-1/768=?
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计算 2/3+1/6+1/12+1/24+1/48+1/96+1/192
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
1/24÷(1/2-1/3+1/6-1/12)
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
(-5/12-1/24-5/6)*(24*5/9-24*2/9+24*2/3)
1/3+1/6+1/12+1/24+……+1/3*2^n-1+……= 同上
(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)
1,2,3,1,2,6,1,2,12,1,2,24,1,2,( ).括号中应填( )
(2/3-5/6-7/8+1/12)*(-24)=?
1+2+3+6+12+24+.+1986=?
1-2-3-6-12-24-找规律下一个是多少
(5/12+1/6-3/4)×(-24)
简算:24×(1/2+1/3-1/4-1/6)
(1/2+1/3+1/4+1/6)*24