Notation of matrices  Matrices
Notation of matrices
Lessons
Notes:
Note
A matrix is a list of numbers put in a rectangular bracket.
The dimensions of a matrix are the number of rows and columns of the matrix. For example, if the matrix has m rows and n columns, then we say that the dimensions matrix is m by n.
Each entry in the matrix is called a matrix element. Let the matrix be called A. Then we say that the
matrix element $a_{4,6}$ is the entry in the 4th row and 6th column.

a)
What is a matrix and the dimension of a matrix?

b)
Matrix elements


2.
The Dimensions of a Matrix
Determine the dimensions of the following matrices:

3.
Matrix Elements
Find the matrix element (or value) of the following matrix