不過我學校好少出咁難的haha
呢d係補習數黎
小雪冰 發表於 29-3-2011 17:39 http://www.nakuz.com/bbs/images/common/back.gif
呢條數係normal架咋=.= 呢條數係normal架咋=.=
maxycy 發表於 29-3-2011 05:42 PM http://www.nakuz.com/bbs/images/common/back.gif
orz
可能我學校程度淺(?) Q1.
3^2x - 4(3^x) + 3 =0
let 3^x be y
y^2-4y+3=0
(y-3)(y-1)=0
y=1 or 3
thus,
3^x=1or 3^x=3
x ...
maxycy 發表於 26-3-2011 23:23 http://www.nakuz.com/bbs/images/common/back.gif
用log 喎!!
let同be咩黎??????? 用log 喎!!
let同be咩黎???????
小人小小人 發表於 4-4-2011 21:21 http://www.nakuz.com/bbs/images/common/back.gif
let 3^x be y
即
設3^x=y
頁:
1
[2]