Question

Determinati valoarea numarului natural a stiind ca numarul B=$\frac{2}{a} + \frac{1}{3}$

Answer 1

                          
$B= \frac{2}{a} + \frac{1}{3} \\ a\; \epsilon \; N \\ B\; \epsilon \; N \\ \frac{2}{a} + \frac{1}{3}=1 \\\\ \frac{2}{a} =1-\frac{1}{3} \\\\ \frac{2}{a} =\frac{2}{3} \\ => \;\;\;a=\boxed{3} \\ \\ VERIFICARE: \\ \\ \frac{2}{a} + \frac{1}{3} =\frac{2}{3} + \frac{1}{3} =\frac{3}{3}=1\; \epsilon \;N$