[tex]\it Vom\ nota\ \sqrt{2a-1}=b,\ iar \ num\breve ar\breve atorul\ devine:\\ \\ \dfrac{b+1-b+1}{\sqrt2}=\dfrac{2}{\sqrt2}\\ \\ Vom\ nota\ \sqrt{a-1}=c,\ iar \ numitorul\ devine:\\ \\ \dfrac{c+1-c+1}{\sqrt2}=\dfrac{2}{\sqrt2}\\ \\ Deci, expresia\ dat\breve a\ are\ valoarea \ constant\breve a\ 1,\ \forall\ a\in\[[2,\ \ \infty)[/tex]
