Đề bài

Tính các giới hạn sau:

a) $\lim \frac{{5n + 1}}{{2n}};$                  

b) $\lim \frac{{6{n^2} + 8n + 1}}{{5{n^2} + 3}};$                           

c) $\lim \frac{{\sqrt {{n^2} + 5n + 3} }}{{6n + 2}};$

d) $\lim \left( {2 - \frac{1}{{{3^n}}}} \right);$           

e) $\lim \frac{{{3^n} + {2^n}}}{{{{4.3}^n}}};$                               

g) $\lim \frac{{2 + \frac{1}{n}}}{{{3^n}}}.$