函數(shù)y=lg（6/x+3-1）的圖像關(guān)于原點(diǎn)對(duì)稱,因?yàn)?br/>y=lg（6/(x+3)-1）
=lg[(6-x-3)/(x+3)]
=lg[(3-x)/3+x)]
令f(x)=lg[(3-x)/3+x)]
f(-x)=lg[(3+x)/(3-x)]
=lg[(3-x)/(3+x)]^(-1)
=-lg[(3-x)/(3+x)]
=-f(x)
所以為奇函數(shù),從而關(guān)于原點(diǎn)對(duì)稱.