Tính LIM {{5{n^2} - 2n + 7 / 2 + 3n - 4{n^2
Giải thích
\(\mathop {\lim }\limits_{n \to + \infty } \frac{{5{n^2} - 2n + 7}}{{2 + 3n - 4{n^2}}} = \mathop {\lim }\limits_{n \to + \infty } \frac{{5 - \frac{2}{n} + \frac{7}{{{n^2}}}}}{{\frac{2}{{{n^2}}} + \frac{3}{n} - 4}} = - \frac{5}{4}\)