Maths, please teach me how to do, thanks?
回答 (1)
2018-11-19 12:12 pm
✔ 最佳答案
SolA =9+9/2^2+9/2^4+9/2^6+…+9/2^80
A/2^2=9/2^2+9/2^4+9/2^6+…+9/2^80+9/2*82
3A/4=9－9/2^82
A=9*(1－1/2^82)*(4/3)
=12*[1－2^(－82)]
收錄日期: 2021-04-24 01:13:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20181119034608AA3jXEq