标签数学(lg根号27+lg8-3lg根号10)/lg1.2

发布时间：2021-02-19 21:42:22

标签数学(lg根号27+lg8-3lg根号10)/lg1.2

网友回答

(lg根号27+lg8-3lg根号10)/lg1.2
=(lg3^(3/2)+lg2^3-3/2lg10)/lg1.2
=(3/2*lg3+3/2*lg4-3/2lg10)/lg1.2
=3/2[lg3+lg4-lg10]/lg1.2
=3/2lg(3×4/10)/lg1.2
=3/2lg1.2/lg1.2
=3/2
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