The questions does not look complete, we can complete the question thus
The following represent matrices and the dimension of each is also stated below. A is a matrix of size 4X2 B is a matrix of size 3X5 C is a matrix of size 7X2 D is a matrix of size 5X4 E is a matrix of size 5X3.
Which of the following matrices products are defined?
Answer:
EB is defined
BE is defined
BD is defined
and DA is defined
Step-by-step explanation:
To know that the product of two matrices are defined, the column of the first matrix must be the same as the row of the second matrix.
For example; for EB we have 5 columns for E and 5 rows for B. After this product is done it produces a matrix with dimension 3 x 3, which means 3 by 3 (3 rows by 3 columns)
