(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)
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(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)(1/3+1/6
(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)
(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)
(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)
=1/3×(1+1/2+1/3+1/4+1/8)/[1/2×(1+1/2+1/3+1/4+1/8)]
=(1/3)/(1/2)
=2/3
(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)
=【1/3×(1+1/2+1/3+1/4+1/8)】/【1/2×(1+1/2+1/3+1/4+1/8)】
=(1/3)/(1/2)
=2/3
1/3+1/6+1/9+1/12+1/15
1/(1*3) + 1/(3*6) + 1/(6*9) + 1/(9*12) + …+1/(96*99)
1/3+1/(3+6)+1/(3+6+9)+1/(3+6+9+12)+1/(3+6+9+12+15)+.1/(3+6+9+12+15+.96+99)
1/3+1/(3+6)+1/(3+6+9)+1/(3+6+9+12).+1/(3+6+9+.+99)
计算:1/3*6+1/6*9+1/9*12+.1/3n(3n+3)
1/3+6+1/3+6+9+1/3+6+9+12+1/3+6+9+……+150
1/(3+6)+1/(3+6+9)+1/(3+6+9+12)+.+1/(3+6+9+...+99)
1+1+1+1+1+1+1+1+12+3+3+6+9+85+248等于多少
简算 2/3+1/6+1/9+1/12+1/15+1/18
3/2+6/1+9/1+12/1+15/1+18/1 怎么简算
2/3+1/6+1/9+1/12+1/15+1/18
2/3+1/6+1/9+1/12+1/15+1/18=
数学计算题(3+5/9-2/3)×(1/6+1/9+1/12)-(1/6-1/9+1/12)×3+(1/6+1/9+1/12)×(2/3-5/9)谢谢来答
计算:1/6-(+1/3)-(-1/12)
1/3+3+6/1+3+6+9/1+3+6+9+12/1+...+3+6+9+12+...+99/1急
一道难死人的小学奥数题1/3+1/(3+6)+1/(3+6+9)+1/(3+6+9+12)+…+1/(3+6+9+12+…99)
大家集思广益哈 1+1/(3+6)+1/(3+6+9)+1/(3+6+9+12) +……+1/ (3+6+9+12+……300)
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/5+1/10+1/15+1/20)快