Resposta :
Olá Naiaranina,
Inicialmente, vamos compor a matriz A_{3x2}:
[tex]\left[\begin{array}{ccc}a_{11}&a_{12}\\a_{21}&a_{22}\\a_{31}&a_{32}\end{array}\right][/tex]
De acordo com o enunciado, [tex]a_{ij} = 2i + j[/tex].
Logo, a matriz A é:
A = [tex]\left[\begin{array}{ccc}2*1 + 1&2*1 + 2\\2*2 + 1&2*2+2\\2*3 + 1&2*3 + 2\end{array}\right][/tex]
A = [tex]\left[\begin{array}{ccc}3&4\\5&6\\7&8\end{array}\right][/tex]