(log2底5+log4底0.2)(log4底2+log25底0.4)的值是

问题描述:

(log2底5+log4底0.2)(log4底2+log25底0.4)的值是

原式=[log2底5 +(log2底0.2)/2]*[1/2 + (log2底0.4)/(log2底25)]=(log2底5)/2 * [(log2底5)/(log2底5²)+(log2底0.4)/(log2底25)]=(log2底5)/2 * 1/[2*(log2底5)]=1/4这题我的主要思想就是...