UW Common Math 308 Section 3.2 - CHING FUNG CHUI Math 308,...

Current Score :
15 / 15 Due : Wednesday, October 28 2015 09:30 AM PDT
1. 3/3 points | Previous Answers HoltLinAlg1 3.2.001.
Perform the indicated computations when possible, using the matrices given below. (If an answer
does not exist, enter DNE into any single cell.)
(a)
-3 5
0 5
[-3,5;0,5]
(b)
-1 -6
2 3
[-1,-6;2,3]
(c)
DNE
DNE
DNE
Solution or Explanation
(a)
(b)
(c) is not possible, since A and C are different sizes.
UW Common Math 308 Section 3.2 (Homework)
CHING FUNG CHUI
Math 308, section A, Fall 2015
Instructor: Hon Leung Lee TA
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A = , B = , C =
− 3 1
2 − 1
0 4
− 2 6
6 0
− 1 4
3 3
A + B
AB + I
2
A + C
A + B = + =
− 3 1
2 − 1
0 4
− 2 6
− 3 5
0 5
AB + I
2
= + = + =
− 3 1
2 − 1
0 4
− 2 6
1 0
0 1
− 2 − 6
2 2
1 0
0 1
− 1 − 6
2 3
A + C

2. 3/3 points | Previous Answers HoltLinAlg1 3.2.004.
Perform the indicated computations when possible, using the matrices given below. (If an answer
does not exist, enter DNE into any single cell.)
(a)
-41 15
30 -11
[-41,15; 30,-11]
(b)
0 49 21
-8 30 6
[0, 49, 21; -8, 30, 6]
(c)
DNE
DNE
Solution or Explanation
(a)
(b)
(c) is not possible, since EC is a 3
×
2 matrix, and I
3
is a 3
×
3 matrix.
A = , B = , C = , E