(lg根号2+lg3-lg根号10)/lg1.8

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(lg根号2+lg3-lg根号10)/lg1.8(lg根号2+lg3-lg根号10)/lg1.8(lg根号2+lg3-lg根号10)/lg1.8(lg√2+lg3-lg√10)/lg1.8=[lg(√

(lg根号2+lg3-lg根号10)/lg1.8
(lg根号2+lg3-lg根号10)/lg1.8

(lg根号2+lg3-lg根号10)/lg1.8
(lg√2+lg3-lg√10)/lg1.8
=[lg(√2*3)-1/2]/(lg18-lg10)
=[(lg18)/2-1/2]/(lg18-1)
=1/2

=(lg(根号2*3/根号10))/lg1.8
=(lg(3/根号5))/(lg9-lg5)
=(lg3-0.5lg5)/(2lg3-lg5)
=1/2