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已知a=log3 2 ,用a表示log3 8-2log3 6是 ?
人气:393 ℃ 时间:2020-03-29 09:21:31
解答
log3 8-2log3 6
= 3log3 2 - 2(log 3 3 + log 3 2)
= 3log3 2 - 2(1 + log3 2)
= log 3 2 - 2
= a - 2
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