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Unformatted text preview: Math 1313
Homework 6
Section 2.5
Use the following information to answer questions 1 – 6.
The following represent matrices and the dimension of each is also stated below.
A is a matrix of size 4X2
B is a matrix of size 3X5
C is a matrix of size 7X2
D is a matrix of size 5X4
E is a matrix of size 5X3
1. The product AB is defined.
a. True
b. False
2. The product BD is defined.
a. True
b. False
3. The product DC is defined.
a. True
b. False
4. The product BE is defined. The dimension of the product is
a. 1X1
b. 2X3
c. 3X5
d. 3X3
e. 5X5
f. None of the above.
5. The product EB is defined. The dimension of the product is
a. 5X1
b. 5X3
c. 5X5
d. 3X3
e. 3X5
f. None of the above.
6. The product DA is defined. The dimension of the product is
a. 5X2
b. 4X4
c. 2X5
d. 5X4
e. 4X2
f. None of the above. 1 Math 1313
Homework 6
Section 2.5
7. The choices for problem number 8 from the book are given below.
−7
a.
35
b.
c.
d. −7
0 −1
0 −1
10 −1
35
f. None of the above.
e. 8. The choices for problem number 13 from the book are given below.
−2 4
a.
12 6
b.
c.
d. 29
5 16
2
12 9
6 2 −4
−4 16 2
9
11 12
f. None of the above.
e. 9. The choices for problem number 36 from the book are given below.
27
0
a. A=
,=
,=
32
12
b. = c. = d. = 02
,
3 −2 20
,
3 −2 20
,
−3 2 = , = = , = = , = , = 02
,=
−3 2
f. None of the above.
e. = 7
12 7
12 −7
12
7
12 2 Math 1313
Homework 6
Section 2.5
10. The choices for problem number 39 from the book are given below.
a. 111
=211,
324 b. = c. = d. −1
=2
−3 −1
2
3 1
2
−3 1
−1
−2 −1
−1
2 1
−1
2 = 1
−1 ,
−4 −1
−1 ,
4 1
−1 ,
4 −1 1
1
= −2 1
1,
−3 −2 −4
f. None of the above. e. , 0
=2
4 = , = , = , = , 0
= −2
−4
0
= −2
4
0
=2
4 0
= −2
4 3 ...
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This note was uploaded on 09/15/2010 for the course MATH Math 1313 taught by Professor Abdelnourahmedzaid during the Fall '10 term at University of Houston.
 Fall '10
 AbdelnourAhmedZaid
 Math, Matrices

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