Răspuns :

Răspuns:

a.

[tex] \frac{2}{4} \frac{7}{9} \frac{5}{7} \frac{5}{9} \frac{2}{9} [/tex]

b.

[tex] \frac{4}{2} \frac{7}{2} \frac{9}{2} \frac{5}{2} [/tex]

c.

[tex] \frac{5}{5} \frac{4}{4} \frac{2}{2} \frac{9}{9} [/tex]