[tex]x = ( {(7 - 4 \sqrt{3} )}^{2017} + \frac{1}{{(7 + 4 \sqrt{3} )}^{2017}} ) \times {(14 + 8 \sqrt{3})}^{2017} [/tex]
Aratati ca numarul x este numar natural .
Dau Coroana!!!!!​