Cuyamaca College
Math 284
Name:_
Instructor: Dan Curtis
Practice Exam 3
1. Determine whether the following is a subspace of
dimension.
a
a) W
2a b
0
: a, b
b 2
b) W
c) W
a 2b c
2a 3c
b c
b 2c
a
b
c
d
: a, b
2a 3b c
: a 4d
b c d
0
0
0
4
. If it is, find a
Math 284
Cuyamaca College
Name:_
Instructor: Dan Curtis
Practice Exam 2
1) True or False. Justify your answers. (Any matrix listed is not assumed to be
square or invertible unless stated.)
a) If AB
AC and A 0, then B C.
b) If D is n n and the equation Dx
Math 284
Cuyamaca College
Name:_
Instructor: Dan Curtis
Practice Exam 1
You have to show your work reducing a matrix for Problem #1 only. For all other
problems, you may use the rref() command in your calculator. Write down any
reduced matrix obtained fro
Math 284
Cuyamaca College
Name:_
Instructor: Dan Curtis
Practice Final Exam
You do not need to show your work when you row reduce a matrix. You may use the rref()
command in your calculator.
1. a) Solve the system of equations. Write your answer in vector