Respuesta :

Answer:

Step-by-step explanation:

[tex]a_{12} :-second~element ~in~first~row\\first~ digit~gives~the~row~number~and~second~digit~gives~the~column.\\a_{11}=first~row~first~column.\\a_{23}=second~row~third~column.\\\\Here~a_{12}=8[/tex]

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