MATRICES AND DETERMINANTS
Higher Concepts of Mathematics
A matrix with only a single row or a single column is called either a row or a column matrix.
A matrix which has the same number of rows as columns is called a square matrix. Examples
of matrices and their dimensions are as follows:
1
7
6
2
4
8
2 x 3
1
7
6
2
3
5
3 x 2
3
2
1
3 x 1
We will use capital letters to describe matrices. We will also include subscripts to give the
dimensions.
A2×3
1
3
3
5
6
7
Two matrices are said to be equal if, and only if, they have the same dimensions, and their
corresponding elements are equal. The following are all equal matrices:
0
1
2
4
0
1
2
4
0
1
1
6
3
4
Addition of Matrices
Matrices may only be added if they both have the same dimensions. To add two matrices, each
element is added to its corresponding element. The sum matrix has the same dimensions as the
two being added.
MA-05
Page 18
Rev. 0
