The order of the matrix is
1x 3
2 x 3
3 x 3
3 x 1
I
0
-A
A
1/3
3
-3
-4
If A is of order 3 x 2 and AB is of order 3 x 3 then B is of order
2 x 2
3 x 2
(AT)T =
AT
Multiplication identify for 2 x 2 matrix is
A 2 x 2 null matrix is
1
2
4
