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Sagot :

In the given image, [tex]a_{23}[/tex] is 5. The correct option is the first option 5

Matrix notation

From the question, we are to determine which entry in the given matrix represents [tex]a_{23}[/tex]

NOTE: For any entry denoted as [tex]a_{mn}[/tex], it represents the entry in the m-th row and n-th column.

Thus,  

 [tex]a_{23}[/tex] represents the entry in the 2nd row and 3rd column.

In the given image, the entry in the 2nd row and 3rd column is 5.

Hence, in the given image, [tex]a_{23}[/tex] is 5. The correct option is the first option 5

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