Given that the matrix A is row equivalent to U: -2 5 05 -1 0 0 0 0 2 3 4 4 -4 5 -3 A = U = 011 4 -4 1 -1 then you should be able to answer the following without doing any row operations. (a) Find a basis for the row space of A. (b) Find a basis for the column space of A. (c) What are the rank and the nullity of A?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section9.7: The Inverse Of A Matrix
Problem 32E
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Linear argebra

Given that the matrix A is row equivalent to U:
2 3
4
-2 5
4
5 -3
0 1
1 -1
-4
05-1
A =
U =
0 0
0 0
4
-4
then you should be able to answer the following without doing any row operations.
(a) Find a basis for the row space of A.
(b) Find a basis for the column space of A.
(c) What are the rank and the nullity of A?
(d) What are the rank and the nullity of AT?
(e) Is there some be R' for which the equation Ax =b has a unique solution x?
(Explain briefly.)
(f) Is there some be R' for which the equation Ax = b is inconsistent?
(Explain briefly.)
(g) Is there some c e R3 for which the equation A" y = c has a unique solution y?
(Explain briefly.)
(h) Is there some c e R3 for which the equation AT y = c is inconsistent?
(Explain briefly.)
Transcribed Image Text:Given that the matrix A is row equivalent to U: 2 3 4 -2 5 4 5 -3 0 1 1 -1 -4 05-1 A = U = 0 0 0 0 4 -4 then you should be able to answer the following without doing any row operations. (a) Find a basis for the row space of A. (b) Find a basis for the column space of A. (c) What are the rank and the nullity of A? (d) What are the rank and the nullity of AT? (e) Is there some be R' for which the equation Ax =b has a unique solution x? (Explain briefly.) (f) Is there some be R' for which the equation Ax = b is inconsistent? (Explain briefly.) (g) Is there some c e R3 for which the equation A" y = c has a unique solution y? (Explain briefly.) (h) Is there some c e R3 for which the equation AT y = c is inconsistent? (Explain briefly.)
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