Răspuns :
[tex]\it \dfrac{a}{8}<\dfrac{2}{15} \Rightarrow 15a<16 \Rightarrow\ a=0,\ sau\ a=1.\\ \\ \rule{1}{0.1}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ (dou\breve a\ valori\ naturale)[/tex]
[tex]\it \dfrac{a}{8}<\dfrac{2}{15} \Rightarrow 15a<16 \Rightarrow\ a=0,\ sau\ a=1.\\ \\ \rule{1}{0.1}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ (dou\breve a\ valori\ naturale)[/tex]