1/8+1/24+1/48+1/80……+1/2400=?
1/8+1/24+1/48+1/80……+1/2400=?
(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)*64=
32-1=8×1,52-1=24=8×3,72-1=48=8×6,92-1=80=8×10,…(1)你发现了什么?(2)
42x(8/1+24/1+48/1+80/1+120/1+168/1)=?
数学题(1/2-1/4)+(1/4-1/6)+(1/6-1/8)+……(1/48-1/50)=?
32-1=8×1;52-1=24=8×3;72-1=48=8×6;92-1=80=8×10…根椐上述的式子,用数学式子表
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+1/288)×128=_____.
1/(2*4)+1/(4*6)+1/(6*8)+1/(8*10)+……1/(48*50)=?
(1/8+1/24+1/48+1/80+1/120+1/168+1/224)乘64
(8/1+24/1+48/1+80/1+120//1+168/1)*42