2/3+1/6+1/9+1/12+1/15+1/18
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2/3+1/6+1/9+1/12+1/15+1/18
2/3+1/6+1/9+1/12+1/15+1/18
2/3+1/6+1/9+1/12+1/15+1/18
2/3+1/6+1/9+1/18=1 (1/9+1/18=1/6+1/6=1/3+2/3=1)
1/12+1/15=3/20
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)
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
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9=1-1/9=8/9为什么呢?写出解析.
(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
(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)=
(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)怎么解?
(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)
1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10+1/11+1/12的整数部分是几,为啥
(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)
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)
6*《9/8-8/7》*《-12》 《3/1-3+6/1-12/7》*《-6》2次方
计算:1/3*6+1/6*9+1/9*12+.1/3n(3n+3)