1. If log4.91=a, then log √491=?
Ans:0.5(a+2)
2.If a>b>0, explain why loga -log b>0 must be true.
列式，多謝!
Form 4 maths question...(2)
2008-10-29 5:15 am
回答 (3)
2008-10-29 5:30 am
✔ 最佳答案
1. log √491=log(491^0.5)= 0.5*log491
= 0.5log(4.91*100)
= 0.5(log4.91+log100)
= 0.5(a+2)
2. log a - log b
= log(a/b)
> 0 because a/b>1 (log x > 0 if x>1)
2008-10-29 5:49 am
2008-10-29 5:18 am
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收錄日期: 2021-04-23 20:36:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081028000051KK01297