F.2 Maths

👨🏻‍🏫 學術台數學

知識就是力量

2008-04-16 12:40 am

If 9 x + 2 = 36 , then 3 x =

Show all steps

更新1:

9 ^ (x + 2) = 36

更新2:

3^x

回答 (1)

terry

2008-04-16 12:45 am

✔ 最佳答案

9 ^ (x + 2) = 36
9^x * 9^2 = 36
9^x = 36/81
3^2x = 36/81
√(3^2x) = √(36/81)
3^(2x/2) = 6/9
3^x = 6/9

👍 0 👎 0

收錄日期: 2021-04-23 17:52:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080415000051KK01463

檢視 Wayback Machine 備份