1. Consider Let R(A) column space of A R(AT) column space of AT, = = A = (b) Find all the vectors b = 12 1 0 0 251 1 0 372 2 -2 1 4 4 9 3 (a) By finding the linearly independent columns, express the four fundamental spaces: R(A), R(AT), N(A), and N(AT). Also find their dimensions. b₁ b₂ N(A) = null space of A, N(AT) = null space of AT. ER such that the system Ax = b is consistent. b3 b4 [Try to establish a relation in the components of b.] Using this result, decide for -2 3 what value of k € R the system Ax = b is inconsistent where b [Instruction: Do not solve Ax = b explicitly.] (c) Do you see any relation between the vector b for which Ax N(AT)? Can you prove this relation in general? -1 k = b is consistent and

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Question
1. Consider
1 2 1
25 1
A =
3 7 2
4 9 3 -1
-2
Let
R(A) = column space of A
R(A") = column space of AT,
N(A) = null space of A,
N(A") = null space of A".
%3D
(a) By finding the linearly independent columns, express the four fundamental spaces:
R(A), R(A"), N(A), and N(A"). Also find their dimensions.
bị
b2
E R' such that the system Ax = b is consistent.
b3
(b) Find all the vectors b =
b4
[Try to establish a relation in the components of b.] Using this result, decide for
-2
3
what value of k eR the system Ax = b is inconsistent where b =
-1
[Instruction: Do not solve Ax = b explicitly.]
(c) Do you see any relation between the vector b for which Ax = b is consistent and
N(A")? Can you prove this relation in general?
Transcribed Image Text:1. Consider 1 2 1 25 1 A = 3 7 2 4 9 3 -1 -2 Let R(A) = column space of A R(A") = column space of AT, N(A) = null space of A, N(A") = null space of A". %3D (a) By finding the linearly independent columns, express the four fundamental spaces: R(A), R(A"), N(A), and N(A"). Also find their dimensions. bị b2 E R' such that the system Ax = b is consistent. b3 (b) Find all the vectors b = b4 [Try to establish a relation in the components of b.] Using this result, decide for -2 3 what value of k eR the system Ax = b is inconsistent where b = -1 [Instruction: Do not solve Ax = b explicitly.] (c) Do you see any relation between the vector b for which Ax = b is consistent and N(A")? Can you prove this relation in general?
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