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其他
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[log4(3)/log4(8)][log3(2)log9(2)]
括号里是真数
= = 我写错了 [log4(3)+log8(3)][log3(2)+log9(2)]
人气:478 ℃ 时间:2020-04-01 14:25:04
解答
[log4(3)+log8(3)]×[log3(2)+log9(2)]
=[1/2log2(3)+1/3log2(3)]×[log3(2)+1/2log3(2)]
=[5/6log2(3)]×[3/2log3(2)]
=5/6×3/2×log2(3)×log3(2)
=5/6×3/2×1
=5/4
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