(a)
To find the value of the matrix.
For the matrices
(a)
Answer to Problem 69E
The value of the matrix is
Explanation of Solution
Given information:
The matrices
Concept Used:
Multiplication of matrices
Two matrix of order
that is
Calculation:
The matrices
Therefore,
(b)
To find the value of the matrix.
For the matrices
(b)
Answer to Problem 69E
The value of the matrix is
Explanation of Solution
Given:
The matrices
Concept Used:
Addition of matrices
Two matrices of any order can be added only when both the matrices have same order.
Multiplication of matrices
Two matrix of order
that is
Calculation:
The matrices
Therefore,
Hence,
On comparing the results of part
Which means, associative property of multiplication holds in case of matrices.
Chapter 7 Solutions
Precalculus with Limits: A Graphing Approach
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