Ответ:
При \(a=\frac{1}{2}\): \(\frac{1}{2}+3\frac{2}{5}=\frac{5}{10}+3\frac{4}{10}=3\frac{9}{10}\).
При \(a=1\frac{1}{3}\): \(1\frac{1}{3}+3\frac{2}{5}=4+\frac{5}{15}+\frac{6}{15}=4\frac{11}{15}\).
При \(a=\frac{5}{7}\): \(\frac{5}{7}+3\frac{2}{5}=3+\frac{25}{35}+\frac{14}{35}=3\frac{39}{35}=4\frac{4}{35}\).
При \(a=1\frac{1}{9}\): \(1\frac{1}{9}+3\frac{2}{5}=4+\frac{5}{45}+\frac{18}{45}=4\frac{23}{45}\).
