f4..maths
回答 (3)
2007-02-22 7:39 am
✔ 最佳答案
4a^-2=94/a^2=9
...a^2=4/9
.......a=士2/3
2007-02-21 23:40:23 補充：
士= 正負
2007-02-21 23:41:43 補充：
4a^-2=94/a^2=9...a^2=4/9.......a=±2/3
2007-02-22 7:43 am
4a^-2=9
1/a^2=9/4
1/a=3/2
a=2/3
1/a^2=9/4
1/a=3/2
a=2/3
2007-02-22 7:40 am
-2log a =log 9/4
a =0.66666666.....
a =0.66666666.....
收錄日期: 2021-04-13 15:30:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070221000051KK05605