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最佳答案:2log5 {10}+log5 {0.25}=log5{10^2}+log5{0.25}=log5(100*0.25)=log5(5^2)=2
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最佳答案:0.3^(1/2*log0.3 4)=0.3^(log0.3 √4)=0.3^(log0.3 2)=2