Question

How are the entries of the matrix named by position?

Answer 1

Matrix are used to represent numbers in rows and columns.

The position of the matrix elements are:

• $\mathbf{7 \to a_{21}}$
• $\mathbf{-5 \to a_{34}}$
• $\mathbf{-1 \to a_{12} }$

Matrix elements are named using the row and column, the element belongs to.

For instance:

The name of an element in the third row and fifth column of a matrix b is $\mathbf{ b_{35}}$

Using the above explanation, the name of 7, -5 and -1 is as follows;

7 belongs to row 2 and column 1

So, the name is: $\mathbf{ a_{21}}$

$\mathbf{7 \to a_{21}}$

-5 belongs to row 3 and column 4

So, the name is: $\mathbf{ a_{34}}$

$\mathbf{-5 \to a_{34}}$

-1 belongs to row 1 and column 2

So, the name is: $\mathbf{ a_{12}}$

$\mathbf{-1 \to a_{12} }$

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