The solution in #2 is incorrect, can't quote for some reason.
Remember only log(pq) = log p + log q. Can't do anything with log(p+q)
So this question is quite difficult. The major "aha" moment for me is to consider the definition of logarithms.
Also surprise! It's the golden ratio (or its buddy, I can't remember).
Sorry for the huge image lmao. Message me for any queries. Good luck!
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本帖最後由 風之男 於 2020-3-21 02:47 AM 編輯 ]