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更新1:
9 ^ (x + 2) = 36
更新2:
3^x
F.2 Maths
回答 (1)
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
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