How to do 9-12 ?
回答 (2)
2019-06-28 12:02 am
⒐
3^(x - 1) = 81
x - 1 = 4
x = 5 #
⒑
2^(1 - x) = 1 / 8
1 - x = -3
x = 4 #
⒒
4^(2x + 1) = 8^(x - 2)
2^(4x + 2) = 2^(3x - 6)
4x + 2 = 3x - 6
x = -8 #
⒓
2[3^(x - 1)] - 1 = 53
2[3^(x - 1)] = 54
3^(x - 1) = 27
x - 1 = 3
x = 4 #
3^(x - 1) = 81
x - 1 = 4
x = 5 #
⒑
2^(1 - x) = 1 / 8
1 - x = -3
x = 4 #
⒒
4^(2x + 1) = 8^(x - 2)
2^(4x + 2) = 2^(3x - 6)
4x + 2 = 3x - 6
x = -8 #
⒓
2[3^(x - 1)] - 1 = 53
2[3^(x - 1)] = 54
3^(x - 1) = 27
x - 1 = 3
x = 4 #
收錄日期: 2021-04-26 12:35:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20190625143321AAiKqVu