1) log(3X-2) = 0
2) log(8x - 2) - log 3 = 1
唔識做...(maths)
2008-01-30 6:42 am
回答 (2)
2008-01-30 8:09 am
✔ 最佳答案
1 . log(3X-2) = 0(3X-2) = 10既0次
3x = 1+2
x=3
2.log(8x - 2) - log 3 = 1
log[( 8x-2)/3] = 1
[( 8x-2)/3] = 10既1次
[( 8x-2)/3] =10
8x-2=30
8x=30+2
x=4
參考: me
2008-01-30 6:51 am
1) log(3X-2) = 0
3x-2=10^0
3x-2= 1---> x=1
2) log(8x - 2) - log 3 = 1
log((8x-2)/3)=1
(8x-2)/3=10
x=4
3x-2=10^0
3x-2= 1---> x=1
2) log(8x - 2) - log 3 = 1
log((8x-2)/3)=1
(8x-2)/3=10
x=4
參考: ME
收錄日期: 2021-04-13 15:03:46
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https://hk.answers.yahoo.com/question/index?qid=20080129000051KK03526