Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.4: The Lu Factorization
Problem 6EQ
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27 3 -5 -35
-1
1 0 0
-1
4
Suppose A =
and A-1 =
18 2 -3 -23
-1
-1
44 5-8 -56
1
0.
Consider the system Ax
= b wherex =
and b =
Then x4=
(A) –1
(B) 0
(C) 1
(D) 2
(E) 5
Transcribed Image Text:27 3 -5 -35 -1 1 0 0 -1 4 Suppose A = and A-1 = 18 2 -3 -23 -1 -1 44 5-8 -56 1 0. Consider the system Ax = b wherex = and b = Then x4= (A) –1 (B) 0 (C) 1 (D) 2 (E) 5
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