lg8*log2(5)*log5(4)得多少?

问题描述:

lg8*log2(5)*log5(4)得多少?

=lg8*(lg5/lg2)*lg4/lg5
=(lg8)*2
=(3lg2)*2
=6lg2有没有可能把lg消掉?lg2是最简单的了只能是lg2=0.301=6lg2 =1.806