Consider the following matrix 14 -1 -3 2 7 1 -2 A = 1 0 3 2 -3 -5 Find an LU-factorization of A. A Use these L and U to solve the system Ax = b, where x = and 7 b =

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
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Chapter5: Systems Of Equations And Inequalities
Section: Chapter Questions
Problem 4CC
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If possible solve the marked part only - 

as b and c are interconnected. Please try to solve both. Thanks

2. (a) Solve the following system of linear equations by using Gauss-Jordan elimination
process.
-x1 +3x2 - 2xz + 4x4 = 0
4r1 + 12x2 + 7x3 – 14x4
x1 – 3x2 + 4x3 – 8x4
-1
= 2
2.x1 – 6x2 + x3 – 2x4
-3.
Write the solution in column form by explicitly isolating the parameter(s) associated
rith free variable(s), if there is any.
Consider the following matrix
1 4 -1
1 -2
-3
2 7
A =
1 0
-1 2 -3
3
-5
Find an LU-factorization of A.
I2
Z Use these L and U to solve the system Ax = b, where x =
and
13
7
b =
5
-2
Find A-1. Use A-l to solve the system Ax = b, where A, x and b are the same as
given in 2(b).
Transcribed Image Text:2. (a) Solve the following system of linear equations by using Gauss-Jordan elimination process. -x1 +3x2 - 2xz + 4x4 = 0 4r1 + 12x2 + 7x3 – 14x4 x1 – 3x2 + 4x3 – 8x4 -1 = 2 2.x1 – 6x2 + x3 – 2x4 -3. Write the solution in column form by explicitly isolating the parameter(s) associated rith free variable(s), if there is any. Consider the following matrix 1 4 -1 1 -2 -3 2 7 A = 1 0 -1 2 -3 3 -5 Find an LU-factorization of A. I2 Z Use these L and U to solve the system Ax = b, where x = and 13 7 b = 5 -2 Find A-1. Use A-l to solve the system Ax = b, where A, x and b are the same as given in 2(b).
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