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Vamos lá!
![AB = \left[\begin{array}{ccc}2&1\\-1&3\\\end{array}\right] . \left[\begin{array}{ccc}2&0\\1&4\\\end{array}\right] \\ \\ AB = \left[\begin{array}{ccc}2.2+1.1&2.0+1.4\\(-1).2+3.1&(-1).0+3.4\\\end{array}\right] \\ \\ AB = \left[\begin{array}{ccc}5&4\\1&12\\\end{array}\right]](https://tex.z-dn.net/?f=AB+%3D+%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2%26amp%3B1%5C%5C-1%26amp%3B3%5C%5C%5Cend%7Barray%7D%5Cright%5D+.+++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2%26amp%3B0%5C%5C1%26amp%3B4%5C%5C%5Cend%7Barray%7D%5Cright%5D++%5C%5C+%5C%5C+++AB+%3D+++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2.2%2B1.1%26amp%3B2.0%2B1.4%5C%5C%28-1%29.2%2B3.1%26amp%3B%28-1%29.0%2B3.4%5C%5C%5Cend%7Barray%7D%5Cright%5D++%5C%5C++%5C%5C+AB+%3D+++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D5%26amp%3B4%5C%5C1%26amp%3B12%5C%5C%5Cend%7Barray%7D%5Cright%5D+ "AB = \left[\begin{array}{ccc}2&1\\-1&3\\\end{array}\right] . \left[\begin{array}{ccc}2&0\\1&4\\\end{array}\right] \\ \\ AB = \left[\begin{array}{ccc}2.2+1.1&2.0+1.4\\(-1).2+3.1&(-1).0+3.4\\\end{array}\right] \\ \\ AB = \left[\begin{array}{ccc}5&4\\1&12\\\end{array}\right]")
Resposta: Letra "A".
Feito! ;)
Resposta: Letra "A".
Feito! ;)
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