In this lesson our instructor talks about cofactor expansions. First, he talks about cofactor expansions and their application. Then he discusses evaluation of determinants by cofactor, inverse of a matrix by cofactor, and list of non-singular equivalences. He ends the lesson by talking about Cramer's Rule.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
The book introduces concepts early in a familiar, concrete real number setting, develops them gradually, and returns to them again and again throughout the text so that when discussed in the abstract, these concepts are more accessible.