更新1:
ln(2x + 3) - 3 = ln(x -5)?
ln(2x + 3) - 3 = ln(x -5)?
回答 (2)
2016-01-03 2:28 am
In(2x+3)-3=In(x-5)
(2x+3)(e^-3)=x-5
2(e^-3)x+3(e^-3)=x-5
[2(e^-3)-1]x=-5-3(e^-3)
x=5.72
(2x+3)(e^-3)=x-5
2(e^-3)x+3(e^-3)=x-5
[2(e^-3)-1]x=-5-3(e^-3)
x=5.72
2016-01-02 10:37 pm
Ln(2x+3)-3=ln(x-5)
ln(2x+3)-ln(x-5)=3
ln((2x+3)/(x-5))=3
(2x+3)/(x-5)=e^3
2x+3=e^3(x-5)
(e^3-2)x=3+5e^3
x=(3+5e^3)/(e^3-2)
=5.7188064 (approx.)
ln(2x+3)-ln(x-5)=3
ln((2x+3)/(x-5))=3
(2x+3)/(x-5)=e^3
2x+3=e^3(x-5)
(e^3-2)x=3+5e^3
x=(3+5e^3)/(e^3-2)
=5.7188064 (approx.)
收錄日期: 2021-04-18 14:17:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160102073136AA6YFRt