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3
A matriz é do tipo:
![A=\left[\begin{array}{ccc}a_{11}&a_{12}\\a_{21}&a_{22}\end{array}\right] \\
\\
a_{12}=2.1+1-1=2\\
a_{12}=2.1+1-2=1\\
a_{21}=2.2+1-1=4\\
a_{22}=2.2+1-2=3\\
\\
A=\left[\begin{array}{ccc}2&1\\4&3\end{array}\right]](https://tex.z-dn.net/?f=++A%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Da_%7B11%7D%26amp%3Ba_%7B12%7D%5C%5Ca_%7B21%7D%26amp%3Ba_%7B22%7D%5Cend%7Barray%7D%5Cright%5D+%5C%5C%0A%5C%5C%0Aa_%7B12%7D%3D2.1%2B1-1%3D2%5C%5C%0Aa_%7B12%7D%3D2.1%2B1-2%3D1%5C%5C%0Aa_%7B21%7D%3D2.2%2B1-1%3D4%5C%5C%0Aa_%7B22%7D%3D2.2%2B1-2%3D3%5C%5C%0A%5C%5C%0AA%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2%26amp%3B1%5C%5C4%26amp%3B3%5Cend%7Barray%7D%5Cright%5D+ "A=\left[\begin{array}{ccc}a_{11}&a_{12}\\a_{21}&a_{22}\end{array}\right] \\
\\
a_{12}=2.1+1-1=2\\
a_{12}=2.1+1-2=1\\
a_{21}=2.2+1-1=4\\
a_{22}=2.2+1-2=3\\
\\
A=\left[\begin{array}{ccc}2&1\\4&3\end{array}\right]")
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