Giải thích các bước giải:
\(\begin{array}{l}
13.F = \lim \frac{{{{\left( {1 - \frac{2}{n}} \right)}^7}{{\left( {2 + \frac{1}{n}} \right)}^3}}}{{{{\left( {1 + \frac{2}{{{n^2}}}} \right)}^5}}}\\
= \frac{{{1^7}{{.2}^3}}}{{{1^5}}} = 8\\
14.\lim \frac{{\frac{1}{{{n^2}}} + \frac{3}{{{n^2}}} + \frac{5}{{{n^2}}} + ... + \left( {\frac{2}{n} + \frac{1}{{{n^2}}}} \right)}}{{3 + \frac{4}{{{n^2}}}}}\\
= \frac{0}{3} = 0
\end{array}\)
