Answer:
product AB has dimension of 1 * 3
product BA does not exist
Explanation:
Given the matrices
A = 1 * 1 (one row and one column)
B = 1 * 3 (one row and three column)
If the product of the martrices AB is taken, then size of the product will be 1*3
For the product BA
BA = 1*3 * 1 * 1
Since the size of column of first matrix is diffrent from the row of matrix B, then the products doesn't exist
