Question

Dadas as matrizes A e B a alternativa que representa A+B, é:

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

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

a $\left[\begin{array}{ccc}0&1\\1&1\end{array}\right]$
b$\left[\begin{array}{ccc}5&-8\\-1&2\end{array}\right]$
c $\left[\begin{array}{ccc}5&8\\3&2\end{array}\right]$
d $\left[\begin{array}{ccc}5&0\\-1&-2\end{array}\right]$
e$\left[\begin{array}{ccc}3&1\\2&9\end{array}\right]$

Answer 1

$Resolu\c{c}\~ao \to \left\{\begin{array}{ccc} \left[\begin{array}{ccc}3&4\\-2&1\\\end{array}\right] + \left[\begin{array}{ccc}2&-4\\1&-3\\\end{array}\right] = \left[\begin{array}{ccc}3+2&4-4\\-2+1&1-3\\\end{array}\right]\\\\= \boxed{\boxed{ \left[\begin{array}{ccc}5&0\\-1&-2\\\end{array}\right] }}\to Letra\ D \end{array}\right$

Espero ter ajudado. :))