Sejam A= (-4 3) e B= (1 0) Calcule o determinante das matrizes:
(1 2) (-1 3)
a) A-B b)A+2B c) A.B
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A) A-B = ![\left[\begin{array}{ccc}-5&3&\\2&-1&\\&&\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-5%26amp%3B3%26amp%3B%5C%5C2%26amp%3B-1%26amp%3B%5C%5C%26amp%3B%26amp%3B%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}-5&3&\\2&-1&\\&&\end{array}\right]")
B) A+2B =![\left[\begin{array}{ccc}-2&3&\\-1&8&\\&&\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-2%26amp%3B3%26amp%3B%5C%5C-1%26amp%3B8%26amp%3B%5C%5C%26amp%3B%26amp%3B%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}-2&3&\\-1&8&\\&&\end{array}\right]")
C) A.B =![\left[\begin{array}{ccc}-4&0&\\-1&6&\\&&\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-4%26amp%3B0%26amp%3B%5C%5C-1%26amp%3B6%26amp%3B%5C%5C%26amp%3B%26amp%3B%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}-4&0&\\-1&6&\\&&\end{array}\right]")
B) A+2B =
C) A.B =
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