y=(2x+3)/(3x-1)
=[(2/3)(3x-1)+11/3]/(3x-1)
=(2/3)+(11/3)/(3x-1)
∵ 3x-1≠0
∴ (11/3)/(3x-1)≠0
即 y≠2/3
∴ 值域是{y|y≠2/3}