Resposta:
[tex]\textsf{Leia abaixo}[/tex]
Explicação passo a passo:
[tex]\mathsf{A_{2x2} \iff a_{ij} = i + 2j }[/tex]
[tex]\begin{bmatrix}\cancel a_{11}&\cancel a_{12}\\\cancel a_{21}&\cancel a_{22}\end{bmatrix}[/tex]
[tex]\begin{bmatrix}\cancel 1 + 2(1)&\cancel 1 + 2(2)\\\cancel 2 + 2(1)&\cancel 2 + 2(2)\end{bmatrix}[/tex]
[tex]\begin{bmatrix}\cancel 3&\cancel 5\\\cancel 4&\cancel 6\end{bmatrix}[/tex]
[tex]\mathsf{D = (3.6) - (4.5)}[/tex]
[tex]\mathsf{D = 18 - 20}[/tex]
[tex]\boxed{\boxed{\mathsf{D = -2}}}[/tex]
