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This leaflet will show you how to find the determinant of a 3 × 3 matrix. We will choose the third column with elements 3, 1, 0. The determinant is then given by. Note that we don’t need to work out the cofactor of 0 since it is going to be multiplied by zero. 5 2 = 35 + 4 = 39. The place sign of 3 is. 7 +, so the cofactor is 39. −1 4 − 2 = 26.
The determinant of a matrix is equal to the determinant of the transposed matrix i.e. Therefore, if there is a zero in the first column, transpose and calculate the determinant or use the alternative formula.
Determinants_3x3 - Free download as PDF File (.pdf), Text File (.txt) or read online for free.
Determinants, 3x3.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Scribd is the world's largest social reading and publishing site.
3x3 determinants and Cramers Rule 4x4 determinants.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document contains lessons on calculating determinants of 3x3 and 4x4 matrices, as well as using Cramer's Rule for solving systems of equations with 3x3 matrices.
In the next leaflet in the series we will provide an example of finding a determinant in the most efficient way. Note that a video tutorial covering the content of this leaflet is available from sigma.
Create your own worksheets like this one with Infinite Algebra 2. Free trial available at KutaSoftware.com.
