(1/8+1/24+1/48+1/80+1/120+1/168)*56
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(1/8+1/24+1/48+1/80+1/120+1/168)*56(1/8+1/24+1/48+1/80+1/120+1/168)*56(1/8+1/24+1/48+1/80+1/120+1/16
(1/8+1/24+1/48+1/80+1/120+1/168)*56
(1/8+1/24+1/48+1/80+1/120+1/168)*56
(1/8+1/24+1/48+1/80+1/120+1/168)*56
(1/8+1/24+1/48+1/80+1/120+1/168)*56
=(2/8+2/24+2/48+2/80+2/120+2/168)*28
=[2/2*4+2/4*6+2/6*8+2/8*10+2/10*12+2/12*14)*28
=[(1/2-1/4)+(1/4-1/6)+(1/6-1/8)+(1/8-1/10)+(1/10-1/12)+(1/12-1/14)]*28
=(1/2-1/14)*28
=1/2*28-1/14*28
=14-2
=12
音乐
1/8+1/24+1/48+1/80
1/8+1/24+1/48+1/80简便计算
(1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64=
(1/8+1/24+1/48+1/80+1/120+1/168+1/224)乘64
(1/8+1/24+1/48+1/80+1/120+1/168)简便计算
(1/8+1/24+1/48+1/80+1/120+1/168)乘以56
(8/1+24/1+48/1+80/1+120//1+168/1)*42
1/8+1/24+1/48+1/80+1/120+1/168
(1/8+1/24+1/48+1/80+1/120+1/168)*56
42x(8/1+24/1+48/1+80/1+120/1+168/1)=?求求
42X(1/8+1/24+1/48+1/80+1/120+1/168)求解
8分之1+24分之1+48分之1+80分之1+120分之1=?
8/1+24/1+48/1+80/1+120/1要过程
1/8+1/24+1/48+1/80+.+1/360 =
1/8+1/24+1/48+1/80……+1/2400=?
1/2+1/8+1/24+1/48+1/80要简便哦
1/2 +1/8+1/24+1/48+1/80怎么做
1/3+1/8+1/15+1/24+1/35+1/48+1/63+1/80+1/99怎么求