8/1+15/1+24/1+```````+143/1
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8/1+15/1+24/1+```````+143/18/1+15/1+24/1+```````+143/18/1+15/1+24/1+```````+143/1首先题目应该写成1/8+1/15+1/
8/1+15/1+24/1+```````+143/1
8/1+15/1+24/1+```````+143/1
8/1+15/1+24/1+```````+143/1
首先题目应该写成1/8+1/15+1/24+……+1/143
1/8+1/15+1/24+……+1/143
=1/(2*4)+1/(3*5)+(4*6)+……+1/(11*13)
=1/2*[1/2-1/4+1/3-1/5+1/4-1/6+……+1/11-1/13]
=1/2*(1/2+1/3-1/12-1/13)
=105/256
(a*a-1)/1+....(a*a-1)/1
其中a=3,4,5.....12
1,3,8,15,24,( ).
1/3+1/8+1/15+1/24+.1/9800
8/1+15/1+24/1+```````+143/1
(1+1/3)*(1+1/8)*(1+1/15)*(1+1/24)*.*(1+1/9800)
找规律.1,3,8,15,24,( ).
1/3+1/8+1/15+1/24+1/35+...+1/80+1/99 怎么解
1/3 1/8 1/15 1/24 ...1/80 1/99
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
1/3+1/8+1/15+1/24+1/35+.1/9999=
1/3+1/8+1/15+1/24+1/35+1/48+1/63+1/80+1/99怎么求
(1/8+1/15+1/24+1/35+1/48)*2
1/3+1/8+1/15+1/24……+1/320
8分之5/15是24还是24分之1?是8分之5除以15
-1/3 1/8 -1/15 1/24 的通项公式是?速度!
(1-3/8)*(1-3/15)*(1-3/24)*.*(1-3/99)谢谢了,急..
数列1/3,1/8,1/15,1/24的一个通项公式为
求-1/3,1/8,-1/15,1/24的通项公式