Question

obtenha a matriz A...​

Answer 1

Lembrando que "i" representa a linha e "j", a coluna dos elementos da matriz, temos:

$A~=~\left[\begin{array}{ccc}a_{11}&a_{12}&a_{13}\\a_{21}&a_{22}&a_{23}\end{array}\right]\\\\\\\\A~=~\left[\begin{array}{ccc}2.(1+1)&3~.~1+2^2&3~.~1+3^2\\(1+1)~.~2~.~1&2~.(2+2)&3~.~2+3^2\end{array}\right]\\\\\\\\A~=~\left[\begin{array}{ccc}4&7&12\\4&8&15\end{array}\right]$