considere as matrizes A=[1 2 4][3 4 9] e B[ -5 5 -8][0 2 -6] determime. a) A+B b)(-A)+(-B) C)-5A+2B
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a) ![\left[\begin{array}{ccc}-4&7&-4\\3&6&3\\\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-4%26amp%3B7%26amp%3B-4%5C%5C3%26amp%3B6%26amp%3B3%5C%5C%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}-4&7&-4\\3&6&3\\\end{array}\right]")
b)![\left[\begin{array}{ccc}4&-7&4\\-3&-6&-3\\\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D4%26amp%3B-7%26amp%3B4%5C%5C-3%26amp%3B-6%26amp%3B-3%5C%5C%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}4&-7&4\\-3&-6&-3\\\end{array}\right]")
c)![\left[\begin{array}{ccc}-15&0&-36\\-15&-16&-57\\\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-15%26amp%3B0%26amp%3B-36%5C%5C-15%26amp%3B-16%26amp%3B-57%5C%5C%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}-15&0&-36\\-15&-16&-57\\\end{array}\right]")
b)
c)
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