Urči limitu funkce \lim _{x \rightarrow \infty} \frac{3 x^{2}+1}{x^{2}+x-1}.
\lim _{x \rightarrow \infty} \frac{3 x^{2}+1}{x^{2}+x-1}=3
\lim _{x \rightarrow \infty} \frac{3 x^{2}+1}{x^{2}+x-1}=0
\lim _{x \rightarrow \infty} \frac{3 x^{2}+1}{x^{2}+x-1}=1
\lim _{x \rightarrow \infty} \frac{3 x^{2}+1}{x^{2}+x-1}=2
