Tính lim n → + ∞ 3 n + 1 n + 2 bằng
Giải thích
D
\[\mathop {\lim }\limits_{n \to + \infty } \frac{{3n + 1}}{{n + 2}}\]\[ = \mathop {\lim }\limits_{n \to + \infty } \frac{{3 + \frac{1}{n}}}{{1 + \frac{2}{n}}} = 3\].
D
\[\mathop {\lim }\limits_{n \to + \infty } \frac{{3n + 1}}{{n + 2}}\]\[ = \mathop {\lim }\limits_{n \to + \infty } \frac{{3 + \frac{1}{n}}}{{1 + \frac{2}{n}}} = 3\].