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log3 18-log3 2=log3 16?
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已知log 16 3=a,log 9 16=?用a表示 (16和9是下标) 已知log18 2=a,log 3 2=?用
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log(2/3)81-log(2/3)16+log(2/3)20-log(2/3)30=?写下换算过程,
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设log3^2=a,则log3^18=?
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