想請教各位數學
回答 (1)
2012-02-23 3:39 am
✔ 最佳答案
情況一：4^(x + 1) = 84^(x + 1) = 8
(2^2)^(x + 1) = 2^3
2^(2x + 2) = 2^3
2x + 2 = 3
2x = 1
x = 1/2
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情況二：(4^x) + 1 = 8
(4^x) + 1 = 8
4^x = 7
log(4^x) = log7
x log4 = log7
x = log7/log4
x ≈ 1.4037
參考: andrew
收錄日期: 2021-04-13 18:32:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120222000051KK00646