12^2x+1=8^3x
By steps please!! thx>.
F.3 maths question
2007-10-07 3:19 am
回答 (2)
2007-10-07 6:03 am
✔ 最佳答案
12^(2x+1) = 8^(3x)Both side take log(assume you have learned log in the school, if not you may self-learn it on the Internet)
(2x+1)log 12 = (3x)log 8
2x+1=3x *(log 8 ) / log 12
2x+1=2.5105x
x=1.96 (corr. to 3 sig. fig.)
參考: My Mathematics Knowledge
2007-10-07 3:35 am
12^2x+1=8^3x
144x+1=512x
1=368x
x=1/368
144x+1=512x
1=368x
x=1/368
收錄日期: 2021-04-13 13:47:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071006000051KK04300