The first index number of a matrix element shows its row and the second index number shows its column.
a_(13)=6
Practice makes perfect
By determining the row and column of the indicated element, we can find its place in a matrix. The first index number of a matrix element shows its row and the second index number shows its column.
a_(1 3)
We can see that the indicated element is in row1 and column 3.
A=
3 & 12 & 6
1 & 0 & 9
8 & 7 & 4
Looking at this placement, we can identify that the indicated element is 6.
