a very easy question证明以a为底的b对数等于以c为低的a对数除于以c为低的b对数
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a very easy question证明以a为底的b对数等于以c为低的a对数除于以c为低的b对数
a very easy question
证明以a为底的b对数等于以c为低的a对数除于以c为低的b对数
a very easy question证明以a为底的b对数等于以c为低的a对数除于以c为低的b对数
证明:
原式=lga/lgc/lgb*lgc=lga/lgb=你要的结果
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