急(lg根号下27+lg8-lg根号下1000)\lg1.2=(3/2lg3+3lg2-3/2)/lg1.2然后呢
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![急(lg根号下27+lg8-lg根号下1000)\lg1.2=(3/2lg3+3lg2-3/2)/lg1.2然后呢](/uploads/image/z/266600-56-0.jpg?t=%E6%80%A5%28lg%E6%A0%B9%E5%8F%B7%E4%B8%8B27%2Blg8-lg%E6%A0%B9%E5%8F%B7%E4%B8%8B1000%EF%BC%89%5Clg1.2%3D%EF%BC%883%2F2lg3%2B3lg2-3%2F2%29%2Flg1.2%E7%84%B6%E5%90%8E%E5%91%A2)
急(lg根号下27+lg8-lg根号下1000)\lg1.2=(3/2lg3+3lg2-3/2)/lg1.2然后呢
急(lg根号下27+lg8-lg根号下1000)\lg1.2=(3/2lg3+3lg2-3/2)/lg1.2然后呢
急(lg根号下27+lg8-lg根号下1000)\lg1.2=(3/2lg3+3lg2-3/2)/lg1.2然后呢
=(3/2lg3+3/2lg4-3/2)/lg1.2=3/2lg(3*4/10)/lg1.2=3/2
(lg√27+lg8-lg√1000)/lg1.2
=lg(√27*8/√1000)/lg1.2
=lg[6√6/(5√5)] /lg(6/5)
=log(6/5)[6√6/(5√5)]
=log(6/5)[(6/5)^(3/2)]
=3/2