help:)~~~~
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f4 maths --log既問題
2011-12-16 7:29 am
回答 (1)
2011-12-16 7:37 am
✔ 最佳答案
log x =alog y =b
log{y^2} ( x^(3/4) )
= log( x^(3/4) ) / log( y^2 ) <-- log轉底公式. log{b} (x) = log x/ log b
= [(3/4)log(x)] / [2log(y)] <-- log(x^k) = k log(x)
= 3/8*log(x)/log(y)
= 3/8*a/b
=3a/(8b)
參考: 記住揀我做最佳回答~
收錄日期: 2021-04-13 18:24:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111215000051KK00900