Изменения

<tex> \sum\limits_{i = 0}^k a_{n-i} \cdot \(-c_{i}\) = a_n + a_{n-1} \cdot \(-c_1\) + \ldots + a_{n-k} \cdot \(-c_k\) = a_n - a_{n-1} \cdot c_1 - \ldots - a_{n-k} \cdot c_k = 0</tex>.