Question

Matrizes, ajuda por favor..

Answer 1

$A + B \\ \\ \\ \left[\begin{array}{ccc}2&3&8\\- 5&9&- 6\\7&4&- 1\end{array}\right] + \left[\begin{array}{ccc}3&7&1\\4&2&5\\0&9&4\end{array}\right] = \left[\begin{array}{ccc}5&10&9\\- 1&11&- 1\\7&13&3\end{array}\right]$

$C - A \\ \\ \\ \left[\begin{array}{ccc}7&- 8&3\\4&- 3&2\\9&- 5&1\end{array}\right] - \left[\begin{array}{ccc}2&3&8\\- 5&9&- 6\\7&4&- 1\end{array}\right] = \left[\begin{array}{ccc}5&- 11&- 5\\9&- 12&8\\2&- 9&2\end{array}\right]$

$C - B \\ \\ \\ \left[\begin{array}{ccc}7&-8&3\\4&- 3&2\\9&- 5&1\end{array}\right] - \left[\begin{array}{ccc}- 3&7&1\\4&2&5\\0&9&4\end{array}\right] = \left[\begin{array}{ccc}10&- 15&2\\0&- 5&9\\9&- 14&- 3\end{array}\right]$

04 

$\left[\begin{array}{ccc}a_1_1&a_1_2\\a_2_1&a_2_2\\a_3_1&a_3_2\end{array}\right]$

{ i² - j², se i > j
{ 2i - j, se i = j
{ 3i - j², se i < j

$\left[\begin{array}{ccc}1&- 1\\3&2\\8&5\end{array}\right]$