a.
To find the minors of the matrix.
a.
Answer to Problem 18E
The minors of thematrix are obtained as,
Explanation of Solution
Given information :
The matrixis given as,
Calculation :
The minors of the matrix can be obtainedas,
For
Continuing the pattern; other minors can be obtained as,
Therefore,
The minors of thematrix are obtained as,
b.
To find the cofactors of the matrix.
b.
Answer to Problem 18E
The cofactors of the matrix are obtained as,
Explanation of Solution
Given information :
The matrixis given as,
Calculation :
To find cofactors, combine the minors with the sign pattern of the cofactors.
The cofactors of the matrix can be obtained as,
Therefore,
The cofactors of the matrix are obtained as,
Chapter 7 Solutions
Precalculus with Limits: A Graphing Approach
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