Question

Dadas as matrizes A..........................................................

Answer 1

$a) \left[\begin{array}{ccc}2&-7&1\\3&4&2\\5&-9&6\end{array}\right] + \left[\begin{array}{ccc}2&3&5\\-7&4&-9\\1&2&6\end{array}\right] = \left[\begin{array}{ccc}4&-4&6\\-4&8&-7\\6&-7&12\end{array}\right]$

$b) \left[\begin{array}{ccc}0&-9&3\\4&8&1\\7&3&1\end{array}\right] - \left[\begin{array}{ccc}0&4&7\\-9&8&3\\3&1&1\end{array}\right] = \left[\begin{array}{ccc}0&-13&-4\\13&0&-2\\4&2&0\end{array}\right]$

$c) \left[\begin{array}{ccc}2&-7&1\\3&4&2\\5&-9&6\end{array}\right] * \left[\begin{array}{ccc}2&3&5\\-7&4&-9\\1&2&6\end{array}\right] =$
$\left[\begin{array}{ccc}54&-20&79\\-20&29&-9\\79&-9&-42\end{array}\right]$