我想問點prove
a ^ (log(base a) x) =x ?
log eqt 一問
2009-12-24 5:47 am
回答 (1)
2009-12-24 5:52 am
✔ 最佳答案
LHS take log first :log { a ^ (log(base a) x) }
= log { a ^ (log x / log a) }
= (log x / log a) log a
= log x
So :
log { a ^ (log(base a) x) } = log x
a ^ (log(base a) x) = x
收錄日期: 2021-04-21 22:09:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091223000051KK01717