IF 3=6^x AND 6=3^y , THEN xy= ???
比STEP~~THX!
急F.3 MATHS [Law of indices]
2008-09-13 6:50 am
回答 (1)
2008-09-14 2:06 am
✔ 最佳答案
3=6^xlog3=log6^x
log3=xlog6
x=log3/log6
6=3^y
log6=log3^y
log6=ylog3
y=log6/log3
xy=log3/log6 X log6/log3
xy=1
收錄日期: 2021-04-19 01:53:38
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080912000051KK02186