對數問題,請問如何用a,b表示log2,log3?

2016-02-01 5:20 am
更新1:

謝謝

回答 (1)

2016-02-01 6:18 am
✔ 最佳答案
a=log6-log5=log2+log3-(log10-log2)= -1+2log2+log3..................(1)
b=log9-log8=log3+log3-log2-log2-log2=2log3-3log2.....(2)
(2)-2x(1)==> b-2a= 2-7log2, 7log2=2a-b+2, log2=(2a-b+2)/7....(3)
3x(1)+2(2)=>3a+2b= -3+7log3, 7log3=3a+2b+3, log3=(3a+2b+2)/7


收錄日期: 2021-04-18 14:23:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160131212008AAyYyd6

檢視 Wayback Machine 備份