Mathematics
Senior High

右の解説で、青線のようになる理由を教えてください( ; ; )

2 (5) log2/72-log23 5
5/72 82 5/9 (5) (5)=log2/72 -log2/9=log 21 72 (a=log2 9 (gofgol) =log28=log22 = 3-5
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