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证明不等式1/(log5(19))+(2/log3(19))+(3/log2(19))<2
人气:192 ℃ 时间:2020-03-29 09:42:20
解答
1/(log5(19))+(2/log3(19))+(3/log2(19))
=log19(5)+2*log19(3)+3*log19(2)
=log19(5*9*8)=log19(360)
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