1. log( 6x-8 ) - log2X = log2
2. 3logx+1/2x = log8
3. (logx)^2 =1
4. (logx)^2 -3logx+2=0
5. 2^2x -3(2^x)-10=0
超簡單的數學3! 教教我
2007-10-06 5:59 pm
回答 (2)
2007-10-06 6:09 pm
✔ 最佳答案
As follows~~~圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/log5.jpg?t=1191636581
2007-10-15 19:12:31 補充：
更正第三條logx = -1唔使rejected or 1x = 0.1 or 10
參考: Myself~~~
2007-10-06 6:41 pm
上面的朋友已經答了你的問題.
但我發現第三題 log x = -1 個 case 不需要 reject.
因為 x = 10^-1 => x = 0.1
所以這題的答案應該是 x = 10 or x = 0.1
[有錯請指正!]
但我發現第三題 log x = -1 個 case 不需要 reject.
因為 x = 10^-1 => x = 0.1
所以這題的答案應該是 x = 10 or x = 0.1
[有錯請指正!]
參考: My Maths knowledge
收錄日期: 2021-04-13 13:46:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071006000051KK00907