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化简(lg3+2/5lg9+3/5lg√27-lg√3)/(lg81-lg27)
题目详情
化简(lg3+2/5lg9+3/5lg√27-lg√3)/(lg81-lg27)
▼优质解答
答案和解析
化简(lg3+2/5lg9+3/5lg√27-lg√3)/(lg81-lg27)
(lg3+2/5lg9+3/5lg√27-lg√3)/(lg81-lg27)
=(lg3+4/5lg3+(3/2)(3/5)lg3-1/2lg3)/(4lg-3lg3)
=19/5lg3/lg3
=19/5
(lg3+2/5lg9+3/5lg√27-lg√3)/(lg81-lg27)
=(lg3+4/5lg3+(3/2)(3/5)lg3-1/2lg3)/(4lg-3lg3)
=19/5lg3/lg3
=19/5
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