Giá trị của Lim 4n^2} - 2n + 1} / {2{n^2} + n - 2 bằng bao nhiêu?

Chọn C

           \(\mathop {\lim }\limits_{n \to + \infty } \frac{{4{n^2} - 2n + 1}}{{2{n^2} + n - 2}} = \mathop {\lim }\limits_{n \to + \infty } \frac{{{n^2}\left( {4 - \frac{2}{n} + \frac{1}{{{n^2}}}} \right)}}{{{n^2}\left( {2 + \frac{1}{n} - \frac{2}{{{n^2}}}} \right)}} = \mathop {\lim }\limits_{n \to + \infty } \frac{{4 - \frac{2}{n} + \frac{1}{{{n^2}}}}}{{2 + \frac{1}{n} - \frac{2}{{{n^2}}}}} = 2\)