Eric Nicholas K's answer to Shan Kuek's Secondary 3 A Maths Singapore question.
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The last part is a bit blurry.
Date Posted:
4 years ago
May I ask why log5(3) need to be found first? I don’t quite understand?
We are required to find log 7 3. We are given log 7 5, but we cannot form a link solely based on these two alone. We need the connector log 5 3 or log 3 5 to link these two. This is why I work on the log 15 3 to transform it into some log 3 5 or log 5 3.
We make use of the fact that 3 x 5 = 15 to do this question.
Okayyy thank you