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請不用計數機解答以上問題
謝謝
難解的 log 問題不用計數機
2014-05-21 6:20 am
回答 (2)
2014-05-21 6:45 am
✔ 最佳答案
(h)log (5*√ 20)
= log [5√(4*5)]
= log (5√5 * √4)
= log (5√5 * 2)
= log (10√5)
= ( log 10 ) + ( log √5 )
= 1 + log [ 5^(1/2) ]
= 1 + (1/2) log 5
2014-05-22 9:29 pm
log2＝0.301，log10＝1，所以log5＝0.699。
log (5*√ 20)
＝log5＋0.5(log2 + log10)
＝0.699＋0.5*(0.301＋1)
＝0.699＋0.6505
＝1.3495
log (5*√ 20)
＝log5＋0.5(log2 + log10)
＝0.699＋0.5*(0.301＋1)
＝0.699＋0.6505
＝1.3495
收錄日期: 2021-04-23 23:44:34
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140520000051KK00170