NAME:
.
Math-221-002 : Linear Algebra
February 20th, 2009
QUIZ n.4
Exercise 1. Consider the following matrices. Tell if the corresponding linear transformations
are onto and/or one-to-one
1
100
0 1
1
100
0 0 1 0 0
a. 0 0 1
b. 0 0 1 0 c.
d. 0 0
0 0 0 1 0
Math 221: Linear Algebra Midterm Exam 1
True False Question
1. Every elementary row operation is reversible.
For example, reverse multiplying by constant by multiplying its inverse.
Replace row 2 by adding row 1 to row 2 and then subtract row 1 f