lg1/2-lg5/8+lg12.5-(log23)(log32)详细结果

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lg1/2-lg5/8+lg12.5-(log23)(log32)详细结果lg1/2-lg5/8+lg12.5-(log23)(log32)详细结果lg1/2-lg5/8+lg12.5-(log23)

lg1/2-lg5/8+lg12.5-(log23)(log32)详细结果
lg1/2-lg5/8+lg12.5-(log23)(log32)详细结果

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

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