Date post: | 23-Dec-2015 |
Category: |
Documents |
Upload: | melina-houston |
View: | 315 times |
Download: | 8 times |
I. Determinants of 2x2
B. Examples. Find the determinant.
Ex 1.
Ex 2. Ex 3.
Remark: Matrix with determinant 0 is called singular.
43
32
II. Determinants of 3x3
A.Steps1.Rewrite columns 1 and 2 to the right of column 3.2.Multiply down-diagonals and add them together.3.Multiply up-diagonals and add them together.4.Subtract: down-diagonals – up-diagonals
III.Inverse MatricesRemark: A matrix has an inverse if and only if .
Determine whether A has an inverse.
Ex 1. Ex 2.