Challenging Exponential Questions?
回答 (2)
2016-03-04 4:12 am
✔ 最佳答案
Method 1 (without using log)http://s12.postimg.org/5ull8bnyz/image.png
Method 2
http://s27.postimg.org/ubdwq7ks1/image.png
2016-03-16 5:03 am
60^a=3
a=(log 3)/(log 60)
60^b=5
b=(log 5)/(log 60)
12^((1-a-b)/(2(1-b)))
=12^((1-(log 3)/(log 60) -(log 5)/(log 60))/2(1-(log 5)/(log 60))))
=2
a=(log 3)/(log 60)
60^b=5
b=(log 5)/(log 60)
12^((1-a-b)/(2(1-b)))
=12^((1-(log 3)/(log 60) -(log 5)/(log 60))/2(1-(log 5)/(log 60))))
=2
收錄日期: 2021-04-11 21:22:05
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160303194941AAT7m8a