[tex]\frac{3y-1}{2y+3}\geq 1\Rightarrow \frac{3y-1}{2y+3}-1\geq 0\Rightarrow \frac{y-4}{2y+3}\geq 0\Rightarrow \frac{(y-4)(2y+3)}{(2y+3)^2}\geq 0\Rightarrow (y-4)(2y+3)\geq 0\Rightarrow y\geq 4 hoặc y\leq -\frac{3}{2}\Rightarrow y\geq 4 hoặc y\leq -2[/tex]