2-2分之1-4分之1-8分之1-16分之1-32分之1-……-1024分之1简便计算
答案:2 悬赏:50 手机版
解决时间 2021-02-05 19:23
- 提问者网友:火车头
- 2021-02-05 02:55
2-2分之1-4分之1-8分之1-16分之1-32分之1-……-1024分之1简便计算
最佳答案
- 五星知识达人网友:鸽屿
- 2021-02-05 03:11
2-1/2-1/4-1/8-1/16-1/32-...-1/1024
=1+1-1/2-1/4-1/8-1/16-1/32-...-1/1024
=1+1/2-1/4-1/8-1/16-1/32-...-1/1024
=1+1/4-1/8-1/16-1/32-...-1/1024
=1+1/8-1/16-1/32-...-1/1024
=1+1/16-1/32-...-1/1024
=1+1/32-...-1/1024
......
=1+1/512-1/1024
=1+1/1024
=1025/1024
=1+1-1/2-1/4-1/8-1/16-1/32-...-1/1024
=1+1/2-1/4-1/8-1/16-1/32-...-1/1024
=1+1/4-1/8-1/16-1/32-...-1/1024
=1+1/8-1/16-1/32-...-1/1024
=1+1/16-1/32-...-1/1024
=1+1/32-...-1/1024
......
=1+1/512-1/1024
=1+1/1024
=1025/1024
全部回答
- 1楼网友:猎心人
- 2021-02-05 03:59
1-1/2-1/4-1/8-1/16-1/32-1/64-1/128
=1-(1/2+1/4+1/8+1/16+1/32+1/64+1/128)
=1-(1/2+1/4+1/8+1/16+1/32+1/64+1/128)-1/128+1/128
=1-(1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/128)+1/128
=1-(1/2+1/4+1/8+1/16+1/32+1/64+1/64)+1/128
=--------(类推)
=1-1+1/128
=1/128
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