M340L EXAM 1B 2:00
FALL, 2009
Dr. Schurle
Show all your work on these pages. Be organized and neat. Your work should be your
own; there should be no talking, reading notes, checking laptops, using cellphones, .. . .
1. (16 points) After many row operations you have changed the augmented matrix of a
system of linear equations to the following, which is not yet in reduced echelon form.
Describe all solutions of the system in parametric vector form. DO NOT USE A
CALCULATOR!! SHOW ALL YOUR WORK STEP BY STEP!!!
1 4 0 0 0 2
2 8 4 1 20 34
1 4 3 0 12 20
0 0 −2 1 −4−6
