1、log下标3 2(log下标4 3+log下标8 3)
1、log下标3 2(log下标4 3+log下标8 3)
2、log下标1/3 √27+log下标27 1/3
2、log下标1/3 √27+log下标27 1/3
数学人气:729 ℃时间:2020-01-31 17:38:55
优质解答
1,用换底公式,都换成以3为底的对数.log3(2)[log4(3)+log8(3)]=log3(2)[1/log3(4)+1/log3(8)]=log3(2)[1/2log3(2)+1/3log3(2)]=1/2+1/3=5/62.用换底公式,都换成以3为底的对数.log1/3(√27)+log27(1/3)=log3(√27)/log...
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