Chọn câu đúng:

Trả lời:

Ta có:

\[\frac{{10}}{{11}} = \frac{{50}}{{55}};\frac{{14}}{5} = \frac{{154}}{{55}}\]. Vì \[\frac{{50}}{{55}} < \frac{{154}}{{55}} \Rightarrow \frac{{10}}{{11}} < \frac{{14}}{5}\]

\[\frac{8}{{13}} = \frac{{16}}{{26}};\frac{5}{2} = \frac{{65}}{{26}}\]. Vì \[\frac{{16}}{{26}} < \frac{{65}}{{26}} \Rightarrow \frac{8}{{13}} < \frac{5}{2}\]

\[\frac{7}{5} = \frac{{56}}{{40}};\frac{7}{8} = \frac{{35}}{{40}}\]. Vì \[\frac{{56}}{{40}} > \frac{{35}}{{40}} \Rightarrow \frac{7}{5} > \frac{7}{8}\]

\[\frac{1}{5} = \frac{3}{{15}};\frac{2}{3} = \frac{{10}}{{15}}\]. Vì \[\frac{3}{{15}} < \frac{{10}}{{15}} \Rightarrow \frac{1}{5} < \frac{2}{3}\]

Đáp án cần chọn là: C