Resposta :
[tex] \large{ \boxed{ \boxed{ \tt \: A) \: a_{11} =1; \: a_{12} = - 1; \: a_{21} = 4; \: a_{22} = 2}}}[/tex]
Solução
A matriz é descrita por:
[tex] \large{ \tt \: a_{ij} = 3i - 2i }[/tex]
Assim, podemos obter:
[tex] \large{ \tt \: a_{11} = 3 \cdot1- 2 \cdot1 } \\ \tt \large{ = 3 - 2} \\ \large{ \tt = 1} \\ [/tex]
[tex] \large{ \tt \: a_{12} = 3 \cdot1- 2 \cdot2 } \\ \tt \large{ = 3 - 4} \\ \large{ \tt = - 1} \\[/tex]
[tex] \large{ \tt \: a_{21} = 3 \cdot2- 2 \cdot1 } \\ \tt \large{ = 6 - 2} \\ \large{ \tt = 4} \\[/tex]
[tex] \large{ \tt \: a_{22} = 3 \cdot2- 2 \cdot2 } \\ \tt \large{ = 6 - 4} \\ \large{ \tt = 2} \\[/tex]