唔識做...(maths)

👨🏻‍🏫 學術台數學

Yumi Tse

2008-01-30 6:42 am

1) log(3X-2) = 0

2) log(8x - 2) - log 3 = 1

回答 (2)

handsome_wind

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

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用戶223862

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

參考: ME

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