Compute the following block products: A11 B11 || 1 0 0 --**-**4] 0 1 -5 5 0 0 -1 -5 -6 Let C = AB. Then C can be computed by block multiplication: c = [C₁1 C1₂] - C = [ C22 1 c=[CH CH₂2]- C21 A = [ALI B = A11 A12 A12B21 B11 B12 B21 B22 -1 = Use them to find C₁1, and then evaluate the remaining blocks of C similarly: 6 -2 -2 4 2 6 3 4 −1 1 1 [A11B11+A12B21 A21B11 + A22B21 -5 5 -5 non 6 5 5 1 -4 0 5 A11B12 + A12B22 A21 B12 + A22 B22

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter3: Determinants
Section3.3: Properties Of Determinants
Problem 63E: Let A be an nn matrix in which the entries of each row sum to zero. Find |A|.
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Question
Compute the following block products:
A11B₁1
-1
A
C =
C =
c- [ ]-
C11 C12
C21 C22
= [A!!
Let C = AB. Then C can be computed by block multiplication:
C₁1 C12
C21 C22
B =
A11 A12
A22
A12B21
B11
B21
B12
B22
] =
=
=
1
0
0
Use them to find C₁1, and then evaluate the remaining blocks of C similarly:
6
4
6
0
0
1
-5
0 -1
[A₁1B₁1 + A12B21
A21B11 + A22B21
4
5
5 -4
-5 -6
-2 -2 -5
2
5 -5
3
6
5
-1
5
1
-4
0
A11B12+A12B22
A21B12 + A22 B22
Transcribed Image Text:Compute the following block products: A11B₁1 -1 A C = C = c- [ ]- C11 C12 C21 C22 = [A!! Let C = AB. Then C can be computed by block multiplication: C₁1 C12 C21 C22 B = A11 A12 A22 A12B21 B11 B21 B12 B22 ] = = = 1 0 0 Use them to find C₁1, and then evaluate the remaining blocks of C similarly: 6 4 6 0 0 1 -5 0 -1 [A₁1B₁1 + A12B21 A21B11 + A22B21 4 5 5 -4 -5 -6 -2 -2 -5 2 5 -5 3 6 5 -1 5 1 -4 0 A11B12+A12B22 A21B12 + A22 B22
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