In the last lecture of the Matrix series, Dr. Eaton prepares you on Solving Systems of Equations Using Matrices. You first cover what are matrix equations and then how to use these equations to solve systems of equations. After equating it to standard number equations using the multiplicative inverse, you finish off the lesson with four full video examples.
The identity matrix plays the role of the identity under multiplication.
The inverse of a matrix represents the inverse under multiplication.
A square matrix has an inverse if and only if its determinant is not zero.
The inverse of a 2 x 2 determinant can be calculated using a specific formula.
Identity and Inverse Matrices
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.