   Chapter 11.4, Problem 17E ### Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742

#### Solutions

Chapter
Section ### Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742
Textbook Problem

# 1 5 - 2 0 . Minors and Cofactors Evaluate the minor and cofactor using the matrix A. A = [ 1 0 1 2 − 3 5 2 0 0 4 ] M 12 , A 12

To determine

To evaluate:

The minor M12 and cofactors A12 of the matrix A=.

Explanation

Approach:

Let A be an n×n matrix. The minor Mij of the element aij is the determinant of the matrix obtained by deleting the ith row and jth column of A. The cofactor Aij of the element aij is given below.

Aij=(1)i+jMij

Calculation:

Consider the matrix A=.

The minor M12 is the determinant of the matrix obtained by deleting the first row and second column from A.

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