Question

Pessoal me ajudem pfv!!!

Answer 1

Resposta:

1. Matriz Identidade ou Matriz Simétrica

2. $\left[\begin{array}{ccc}a11&a12&a13\\a21&a22&a23\\a31&a32&a33\end{array}\right] =\left[\begin{array}{ccc}3&4&1\\0&-1&-2\\-3&2&5\end{array}\right] =>[a23= -2]$

3. $\left[\begin{array}{ccc}-5&-3\\2&-7\\\end{array}\right] +\left[\begin{array}{ccc}-1&-5\\0&-1\\\end{array}\right]=\left[\begin{array}{ccc}-6&-8\\2&-8\\\end{array}\right]$

4. $\left[\begin{array}{ccc}-2&-3\\-4&-5\\\end{array}\right] -\left[\begin{array}{ccc}-5&-1\\0&-2\\\end{array}\right] =\left[\begin{array}{ccc}3&-2\\-4&-3\\\end{array}\right]$

5. $\left[\begin{array}{ccc}1&2\\0&3\end{array}\right] .\left[\begin{array}{ccc}4&0\\5&1\end{array}\right] =\left[\begin{array}{ccc}14&2\\15&3\end{array}\right]$

Coloque como melhor resposta porfavor! Vlw