lg1/2-lg5/8+lg12.5-(log23)(log32)详细结果

分类: 作业答案 • 2021-12-19 14:56:26

问题描述：

答

lg1/2-lg5/8+lg12.5-(log23)(log32)
=-lg2-lg5-1+3lg2+2lg5-lg2-lg2/lg3×lg3/lg2
=-1+2lg2+2lg5-1
=-1+2-1
=0

答

lg1/2-lg5/8+lg12.5-(log23)(log32)
=-lg2-lg5+lg8+2-lg8-lg3/lg2*lg2/lg3
=-1+2-1=0