Simplify the following expressions: 3. 5/6 * a * 1 1/5

Решение:

1. \[ \frac{5}{6} \cdot a \cdot 1 \frac{1}{5} = \frac{5}{6} \cdot a \cdot \frac{6}{5} = \left( \frac{5}{6} \cdot \frac{6}{5} \right) \cdot a = 1 \cdot a = a \]

Ответ: a