1/8+1/24+1/48+...+1/2400的答案是多少
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1/8+1/24+1/48+...+1/2400的答案是多少
1/8+1/24+1/48+...+1/2400的答案是多少
1/8+1/24+1/48+...+1/2400的答案是多少
1/8+1/24+1/48+...+1/2400
=1/4(1/2+1/2*3+1/3*4+...+1/24*25)
=1/4(1-1/2+1/2-1/3+1/3-1/4+...+1/24-1/25)
=1/4(1-1/25)
=(1/4)(24/25)
=6/25
只给前三项,做不出来。
8分之1的分母8就等于2*4
24分之1的分母24就等于4*6
…………………………
算出来最后一步是2分之1减去60分之1就等于60分之29
原式=1/2*4+1/4*6+1/6*8+……+1/48*50
=1/2(1/2-1/4+1/4-1/6+……+1/48-1/50)
=1/2(1/2-1/50)
=(1/2)(12/25)
=6/25
简便计算:1/8+1/24+1/48+1/120
1/8+1/24+1/48+1/80
1/8+1/24+1/48+1/80简便计算
简算 8分之1+24分之1+48分之1
8/1+24/1+48/1.2400/1简便计算
8/1+24/1+48/1的简算,
(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
8分之1+24分之1+48分之1+.+48*50分之1=?
(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
1/3+1/8+1/15+1/24+1/35+1/48
1/3,-1/8,1/15,-1/24,1/35,-1/48怎样找规律