(log2底5+log4底0.2)(log4底2+log25底0.4)的值是
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(log2底5+log4底0.2)(log4底2+log25底0.4)的值是(log2底5+log4底0.2)(log4底2+log25底0.4)的值是(log2底5+log4底0.2)(log4底2
(log2底5+log4底0.2)(log4底2+log25底0.4)的值是
(log2底5+log4底0.2)(log4底2+log25底0.4)的值是
(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把不能一下算出来的log都化成同底,化成2,就好算了
有什么不懂的还可以问我