Đề bài

\(\lim \frac{{n + 3}}{{{n^2}}}\) bằng:  A. 1.                                             B. 0.                                             C. 3.                                             D. 2.

Lời giải chi tiết

\(\lim \frac{{n + 3}}{{{n^2}}} = \lim \frac{{{n^2}\left( {\frac{1}{n} + \frac{3}{{{n^2}}}} \right)}}{{{n^2}}} = \lim \left( {\frac{1}{n} + \frac{3}{{{n^2}}}} \right) = 0\)Chọn B.