1/(1*3*5)+1/(3*5*7)+1/(5*7*9)+1/(7*9*11)+1/(9*11*13+)1/(11*13*15)
答案:2 悬赏:20 手机版
解决时间 2021-02-19 18:07
- 提问者网友:锁深秋
- 2021-02-18 23:19
1/(1*3*5)+1/(3*5*7)+1/(5*7*9)+1/(7*9*11)+1/(9*11*13+)1/(11*13*15)
最佳答案
- 五星知识达人网友:第四晚心情
- 2021-02-19 00:26
=1/15+1/105+1/315+1/693+1/1287+1/2145
=1/16/106/316/694/1288/2145
=9.7316042515123674170894241897003e-16
约=9.732
=1/16/106/316/694/1288/2145
=9.7316042515123674170894241897003e-16
约=9.732
全部回答
- 1楼网友:酒安江南
- 2021-02-19 01:25
1/(1*3)+1/(3*5)+1/(5*7)+1/(7*9)+1/(9*11)+1/(11*13)
=1/2[(1-1/3)+(1/3-1/5)+(1/5-1/7)+……+(1/9-1/11)+(1/11-1/13)]
=1/2[1-1/13]
=6/13
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