ln(3x / 2) = 4 , x = ?
回答 (2)
2008-02-06 2:59 am
✔ 最佳答案
ln(3x / 2) = 4 (3x / 2) =e^4
3x=2e^4
x=(2e^4)/3
2008-02-06 3:14 am
ln(3x/2) = 4
ln3 + lnx - ln2 = 4
ln3 + lnx - ln2 = ln(e^4)
lnx = ln(e^4) - ln3 + ln2
lnx = ln(2/3e^4)
x = 2/3e^4
ln3 + lnx - ln2 = 4
ln3 + lnx - ln2 = ln(e^4)
lnx = ln(e^4) - ln3 + ln2
lnx = ln(2/3e^4)
x = 2/3e^4
收錄日期: 2021-04-25 17:27:46
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https://hk.answers.yahoo.com/question/index?qid=20080205000051KK02893