Răspuns :
[tex]\bf \dfrac{2}{5} < \dfrac{2}{3};\ \ \dfrac{6}{8} < \dfrac{6}{7};\ \ \dfrac{1221}{3113} > \dfrac{1221}{3131};\ \ \dfrac{}{}\dfrac{x+2}{2x+1} > \dfrac{x+2}{2x+3}[/tex]
[tex]\bf \dfrac{2}{5} < \dfrac{2}{3};\ \ \dfrac{6}{8} < \dfrac{6}{7};\ \ \dfrac{1221}{3113} > \dfrac{1221}{3131};\ \ \dfrac{}{}\dfrac{x+2}{2x+1} > \dfrac{x+2}{2x+3}[/tex]