Question

Alguém poderia me ajudar por favor? não entendi nada!!
Adição
calcular soma de matrizes

a) A [ 2 3 ] B [-8 -3]
[ 4 8 ] + [-4 -7]

b) A [ 2 3 4] B [ 7 9 4]
[ 1 6 7] + [ 1 6 5]
[ 5 8 6] [ 2 6 8]

c) A [-4 -6 -8] B [-6 -8 -9]
[ 10 8 6] + [-12 -10 -11]

d) A [-3 5 2] B [-8 -9 12]
[ 6 4 8] + [45 6 -3]

e) A [x+3 11 ] B [-5 11]
[ 9 2y-7 ] + [ 9 13]

f) A [x+3 3] B [ 10 3]
[ 1 x-y] + [ 1 2]​

Answer 1

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$\tt a)~\begin{bmatrix}\sf2&\sf3\\\sf4&\sf8\end{bmatrix}+\begin{bmatrix}\sf-8&\sf-3\\\sf-4&\sf-7\end{bmatrix}\\=\begin{bmatrix}\sf2-8&\sf3-3\\\sf4-4&\sf8-7\end{bmatrix}=\begin{bmatrix}\sf-6&\sf0\\\sf~\,\,\,0&\sf1\end{bmatrix}\blue{\checkmark}$

$\tt b)~\begin{bmatrix}\sf2&\sf3&\sf4\\\sf1&\sf6&\sf7\\\sf5&\sf8&\sf6\end{bmatrix}+\begin{bmatrix}\sf7&\sf9&\sf4\\\sf1&\sf6&\sf5\\\sf2&\sf6&\sf8\end{bmatrix}\\=\begin{bmatrix}\sf2+7&\sf3+9&\sf4+4\\\sf1+1&\sf6+6&\sf7+5\\\sf5+2&\sf8+6&\sf6+8\end{bmatrix}=\begin{bmatrix}\sf9&\sf12&\sf8\\\sf2&\sf12&\sf12\\\sf7&\sf14&\sf14\end{bmatrix}\blue{\checkmark}$

$\tt c)~\begin{bmatrix}\sf-4&\sf-6&\sf-8\\\sf10&\sf8&\sf6\end{bmatrix}+\begin{bmatrix}\sf-6&\sf-8&\sf-9\\\sf-12&\sf-10&\sf-11\end{bmatrix}\\=\begin{bmatrix}\sf-4-6&\sf-6-8&\sf-8-9\\\sf10-12&\sf8-10&\sf6-11\end{bmatrix}=\begin{bmatrix}\sf-10&\sf-14&\sf-17\\\sf-2&\sf-2&\sf-5\end{bmatrix}\blue{\checkmark}$

$\tt d)~\begin{bmatrix}\sf-3&\sf5&\sf2\\\sf6&\sf4&\sf8\end{bmatrix}+\begin{bmatrix}\sf-8&\sf-9&\sf12\\\sf45&\sf6&\sf-3\end{bmatrix}\\=\begin{bmatrix}\sf-3-8&\sf5-9&\sf2+12\\\sf6+45&\sf4+6&\sf8-3\end{bmatrix}=\begin{bmatrix}\sf-11&\sf-4&\sf14\\\sf51&\sf10&\sf5\end{bmatrix}\blue{\checkmark}$

$\tt e)~\begin{bmatrix}\sf x+3&\sf11\\\sf9&\sf2y-7\end{bmatrix}+\begin{bmatrix}\sf-5&\sf11\\\sf9&\sf13\end{bmatrix}\\=\begin{bmatrix}\sf x+3-5&\sf11+11\\\sf9+9&\sf2y-7+13\end{bmatrix}=\begin{bmatrix}\sf x-2&\sf22\\\sf18&\sf2y+6\end{bmatrix}\blue{\checkmark}$

$\tt f)~\begin{bmatrix}\sf x+3&\sf3\\\sf1&\sf x-y\end{bmatrix}+\begin{bmatrix}\sf10&\sf3\\\sf1&\sf2\end{bmatrix}\\=\begin{bmatrix}\sf x+3+10&\sf3+3\\\sf 1+1&\sf x-y+2\end{bmatrix}=\begin{bmatrix}\sf x+13&\sf6\\\sf2&\sf x-y+2\end{bmatrix}\blue{\checkmark}$

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