-1 1 -2 -1 -1 1 A = 1 -1 -5 -11 -3 3 -1 7 compute the standard basis for Col(A) and prove that it is a basis by doing the following: (a) Compute the reduced row echelon form of A, RREF(A). (b) Use the RREF(A) to compute the standard basis of Col(A), Bc. (c) Compute the standard basis of Nul(A), BN. (d) Prove that Bc is linearly independent by row reducing the matrix with columns from Bc.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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part b, c, d

1
1
-2
-
1
A =
-1 1
-1
-5
-11
-3
3
-1
7
compute the standard basis for Col(A) and prove that it is a basis by doing the
following:
(a) Compute the reduced row echelon form of A, RREF(A).
(b) Use the RREF(A) to compute the standard basis of Col(A), Bc.
(c) Compute the standard basis of Nul(A), BN.
(d) Prove that Bc is linearly independent by row reducing the matrix with columns
from Bc.
(e) Prove that every non pivot column of A is in Span(Bc) in the following way: for
each standard basis vector in BN, use the coordinates of that vector as scalars
to produce a linear dependence relation for the columns of A. Then solve for the
only non pivot column in the equation.
(f) Give the dimension of range(A), Nul(A), and the domain of A, and write the
rank-nullity equation.
Transcribed Image Text:1 1 -2 - 1 A = -1 1 -1 -5 -11 -3 3 -1 7 compute the standard basis for Col(A) and prove that it is a basis by doing the following: (a) Compute the reduced row echelon form of A, RREF(A). (b) Use the RREF(A) to compute the standard basis of Col(A), Bc. (c) Compute the standard basis of Nul(A), BN. (d) Prove that Bc is linearly independent by row reducing the matrix with columns from Bc. (e) Prove that every non pivot column of A is in Span(Bc) in the following way: for each standard basis vector in BN, use the coordinates of that vector as scalars to produce a linear dependence relation for the columns of A. Then solve for the only non pivot column in the equation. (f) Give the dimension of range(A), Nul(A), and the domain of A, and write the rank-nullity equation.
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