Aplicam inegalitatea ma > mg pentru fiecare radical:
[tex] \frac{1,9+2,1}{2}\ \textgreater \ \sqrt{1,9*2,1} \rightarrow2\ \textgreater \ \sqrt{1,9*2,1} [/tex]
[tex] \frac{2,8+3,2}{2}\ \textgreater \ \sqrt{2,8*3,2}\rightarrow 3\ \textgreater \ \sqrt{2,8*3,2}[/tex]
[tex] \frac{3,7+4,3}{2}\ \textgreater \ \sqrt{3,7*4,3}\rightarrow4\ \textgreater \ \sqrt{3,7*4,3}[/tex]
Daca adunam cele trei relatii vom obtine relatia din enunt.
