1/4X5+1/5X6+1/6X7+1/7X8+1/8X9+1/9X10=多少
答案:5 悬赏:30 手机版
解决时间 2021-03-10 00:53
- 提问者网友：抽煙菂渘情少年
- 2021-03-09 08:17
1/(4X5)+1/(5X6)+1/(6X7)+1/(7X8)+1/(8X9)+1/(9X10)=多少
最佳答案
- 五星知识达人网友：笑迎怀羞
- 2019-05-13 10:12
1/4X5 + 1/5X6 + 1/6X7 + 1/7X8 + 1/8X9 + 1/9X10
= (1/4 - 1/5) + (1/5 - 1/6) + (1/6 - 1/7) + (1/7 - 1/8) + (1/8 -1/9) + (1/9 - 1/10)
= 1/4 - 1/10
= 3/20
= (1/4 - 1/5) + (1/5 - 1/6) + (1/6 - 1/7) + (1/7 - 1/8) + (1/8 -1/9) + (1/9 - 1/10)
= 1/4 - 1/10
= 3/20
全部回答
- 1楼网友：持酒劝斜阳
- 2019-07-03 20:12
3/20
- 2楼网友：独钓一江月
- 2019-11-20 09:42
165
- 3楼网友：長槍戰八方
- 2019-11-06 13:00
原式=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+1/9-1/10
=1/2-1/10
=4/10
=2/5
- 4楼网友：罪歌
- 2019-11-05 03:18
=1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9+1/9-1/10
=1/4-1/10
=3/20
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