\[0,5 = \frac{1}{2}\]
\[\frac{1^{\backslash 4}}{3} + \frac{1^{\backslash 3}}{4} = \frac{4}{12} + \frac{3}{12} = \frac{7}{12}\]
\[\frac{1}{2} = \frac{6}{12};\ \ \ \ \]
\[\ \frac{6}{12} < \frac{7}{12} \Longrightarrow 0,5 < \frac{1}{3} + \frac{1}{4}.\]