一題LOG唔識急問..(logX)^2-logx^5+6=0
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一題LOG唔識急問..(logX)^2-logx^5+6=0
2008-02-24 8:27 pm
回答 (2)
2008-02-24 10:14 pm
✔ 最佳答案
(logx)^2-logx^5+6=0(logx)^2-5logx+6=0
let logx be y
y^2-5y+6=0
(y-3)(y-2)=0
y=3 or 2
logx=3 or 2
x=1000 or 100
2008-02-24 8:45 pm
(logX)^2-logx^5+6=0
(logX)^2-5logx+6=0
(logX-3)(logX-2)=0
so
X=100 or 1000
(logX)^2-5logx+6=0
(logX-3)(logX-2)=0
so
X=100 or 1000
收錄日期: 2021-04-13 19:08:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080224000051KK01421