Question

Considere as matrizes A= (aij)2x3, com aij = 2i-j, e a matriz B= (bij = i+j. A soma de todos os elementos da matriz C=A B é igual a

Answer 1

 $A= \left[\begin{array}{ccc}A11&A12&A13\\A21&A22&A23\end{array}\right] 2 x 3 A= 2i-j 2x1-1=1 2x1-2=0 2x1-3=-1 2x2-1=3 2x2-2=2 2x2-3=1 \left[\begin{array}{ccc}1&0&-1\\3&2&1\end{array}\right]$

$B= \left[\begin{array}{ccc}B11&B12&B13\\B21&B22&B23\end{array}\right] B= i+j 1+1=2 1+2=3 1+3=4 2+1=3 2+2=4 2+3=5$

$A= \left[\begin{array}{ccc}1&0&-1\\3&2&1\end{array}\right] + \left[\begin{array}{ccc}2&3&4\\3&4&5\end{array}\right] = Matriz C= \left[\begin{array}{ccc}3&3&3\\6&6&6\end{array}\right]$