设1<x<a.那么logax2.(logax)2.loga(logax)之间的大小顺序是 A.logax2<(logax)2<loga(logax) B.logax2<loga(logax)<(logax)2 C.loga(logax)<(logax)2<logax2 D.(logax)2<logax2<loga(logax) 解法一:令x=2,a=4,则logax2=log44=1, (logax)2=(log42)2= loga(logax)=log4(log42)=-. ∴loga(logax)<(logax)2<logax2. 解法二:∵1<x<a.∴0<logax<1. logax2=2logax>logax>0, 0<(logax)2<logax,loga(logax)<loga1=0, ∴loga(logax)<(logax)2<logax2. 答案:C 查看更多

 

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设1<x<a,那么logax2、(logax)2、loga(logax)之间的大小顺序是(    )

A.logax2<(logax)2<loga(logax)                            B.logax2<loga(logax)<(logax)2

C.loga(logax)<(logax)2<logax2                            D.(logax)2<logax2<loga(logax)

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