问题标题:
【初中数学】求(log5)^2+(log2)(log50)的值.
问题描述:
【初中数学】求(log5)^2+(log2)(log50)的值.
唐从宽回答:
(log5)^2+(log50)(log2)
(log5)^2+(log(5*10))(log2)
=(log5)^2+(log5+log10)(log2)
=(log5)^2+(log5+1)(log2)
=(log5)^2+(log5)(log2)+log2
=(log5)(log5+log2)+(log2)
=(log5)(log10)+(log2)
=(log5)(1)+(log2)
=(log5)+(log2)
=(log10)
=1
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