\[ \left( \frac{1}{7} \right)^2 = \frac{1^2}{7^2} = \frac{1}{49} \]
\[ \frac{1}{49} + \frac{17}{49} = \frac{1 + 17}{49} = \frac{18}{49} \]
Ответ: [18/49]
[18/49]