Answer :

We are given with,

A matrix of order 2 × 2, A = [aij].



We need to find the value of a12.


Here, if A is of the order 2 × 2 then,


Number of rows of A = 2


Number of columns of A = 2


We can easily find the elements using the representation of element, .


Compare aij with a12.


We get,


i = 1


j = 2


Putting these values in ,



Thus, the value of .


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