9) 145+25 285+45

9) Сократим дробь:

$$\frac{14^{\frac{1}{5}} + 2^{\frac{1}{5}}}{28^{\frac{1}{5}} + 4^{\frac{1}{5}}} = \frac{14^{\frac{1}{5}} + 2^{\frac{1}{5}}}{(2 \cdot 14)^{\frac{1}{5}} + (2^2)^{\frac{1}{5}}} = \frac{14^{\frac{1}{5}} + 2^{\frac{1}{5}}}{2^{\frac{1}{5}} \cdot 14^{\frac{1}{5}} + 2^{\frac{2}{5}}} = \frac{14^{\frac{1}{5}} + 2^{\frac{1}{5}}}{2^{\frac{1}{5}}(14^{\frac{1}{5}} + 2^{\frac{1}{5}})} = \frac{1}{2^{\frac{1}{5}}}$$

Ответ: $$\frac{1}{2^{\frac{1}{5}}}$$