For Problems 1-14, evaluate the determinant of the given matrix by first using elementary row operations to reduce it to upper triangular form. | 3 7 1 2 3 1 1 − 1 0 1 4 8 − 1 6 6 3 7 0 9 4 8 16 − 1 8 12 |
For Problems 1-14, evaluate the determinant of the given matrix by first using elementary row operations to reduce it to upper triangular form. | 3 7 1 2 3 1 1 − 1 0 1 4 8 − 1 6 6 3 7 0 9 4 8 16 − 1 8 12 |
Solution Summary: The author explains how to convert a square matrix into an upper triangular matrix using elementary row operations.
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Solve the linear system of equations attached using Gaussian elimination (not Gauss-Jordan) and back subsitution.
Remember that:
A matrix is in row echelon form if
Any row that consists only of zeros is at the bottom of the matrix.
The first non-zero entry in each other row is 1. This entry is called aleading 1.
The leading 1 of each row, after the first row, lies to the right of the leading 1 of the previous row.
Chapter 3 Solutions
Differential Equations And Linear Algebra, Books A La Carte Edition (4th Edition)
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HOW TO FIND DETERMINANT OF 2X2 & 3X3 MATRICES?/MATRICES AND DETERMINANTS CLASS XII 12 CBSE; Author: Neha Agrawal Mathematically Inclined;https://www.youtube.com/watch?v=bnaKGsLYJvQ;License: Standard YouTube License, CC-BY