Week 8
Class Notes for Week 8
Day 21 - Monday, March 12, 2007
Calculator Assignment due today: Assignment 3 TI-89 Tutorial
Day 22 - Wednesday, March 14, 2007
Solving Linear Equations
(L1)3x+4y=12
(L2)-x+5y=-2
A matrix X vector = b vector
3 4 x 12
-1 5 y -2
We used these matrices to solve for x and y.
-x+2y+3z=14
x -z=5
2y+ z=-16
A matrix X vector = b vector
-1 2 3 x 14
1 0 -1 y 5
0 2 1 z -16
We made a 3x3 matrix and a vector in excel to solve for the x vector.
The solution for a linear system: X=A-1b
If the determinent = 0 then the inverse does not exist.
Day 23 - Friday, March 16, 2007
Leontif Principle is X = M-1*D
A4 - Leontif I/O is given out.
This assignment involves matrices in excel learned during this week.
page revision: 7, last edited: 28 Sep 2007 13:26