有沒有人可以話比我知第三個step怎樣去第4個step
因為我攞住份答案看不明
Q: solve the following logarithmic equations.
log base9 (3x) = lolog base3 6
A: log base9 (3x) = log base3 6
log base3 (3x) / log base3 9 = log base3 6
log base3 (3x) / 2 log base3 3 = log base3 6
log base3 (3x) = 2 log base3 6
log base3 (3x) = log base3 36
3x = 36
x = 12
THX
logarithmic equations
2013-11-15 6:31 am
回答 (1)
2013-11-15 6:48 am
✔ 最佳答案
Please read:圖片參考：http://imgcld.yimg.com/8/n/HA00430218/o/20131114224750.jpg
2013-11-14 23:09:01 補充：
第三行的左邊的分母是 2 * 1 = 2
所以equation兩邊乘2 得出第四行
我後邊的reason都寫了是 log_m (m) = 1
2 log_3 (3) = 2 * 1 = 2
收錄日期: 2021-04-13 19:48:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20131114000051KK00234