Solve equation
log4 x + log2 9 = 2
maths: log
2014-01-02 12:45 am
回答 (1)
2014-01-02 1:01 am
✔ 最佳答案
Suppose it is :log₄X + log₂9 = 2
(log₂X/log₂4) + log₂9 = log₂4
(log₂X/2) + log₂9 = log₂4
log₂X + 2log₂9 = 2log₂4
log₂X + log₂81 = log₂16
log₂(81X) = log₂16
81X = 16
X = 0.19753
收錄日期: 2021-04-27 20:31:51
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https://hk.answers.yahoo.com/question/index?qid=20140101000051KK00131