Khi [tex]n\rightarrow +\infty \Rightarrow \sqrt[3]{n^3+1}-1\approx \sqrt[3]{n^3}=n; \sqrt{n^2+3}-2 \approx n \Rightarrow lim = 1[/tex]
Khi [tex]n\rightarrow -\infty \Rightarrow \sqrt[3]{n^3+1}-1\approx \sqrt[3]{n^3}=n; \sqrt{n^2+3}-2 \approx -n \Rightarrow lim = -1[/tex]