Day 5

System of Linear Equations and using inverse matrices.

by

BJ Kim

Objectives :

Represent a system of linear equation as a matrix equation

Solve matrix equations using inverse matrices

Review

An Algorithm for Computing Matrix Inverse.

We give a formula for computing the inverse 2X2 matrices.

Note : There are several algorithms for computing the inverse of a matrix if it exist. These algorithms involve a great deal of calculation,

so computing matrix inverses is usually done by computer (especially for large matrices).

Activities & Homework

Represent a system of linear equations as a matrix equation

Use the formula to find the inverse of the following

Solve the above matrix equations