4 17. Let A = and B = {b1, b2}, for b = b2 = Define T: R? -→ R² by T(x) = Ax. a. Verify that b, is an eigenvector of A but that A is not diagonalizable. [-]- b. Find the B-matrix for T.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter6: Matrices And Determinants
Section: Chapter Questions
Problem 5P
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Question
Number 17
(p) =
entries
and is
p(1)
p(0)
a. Show that T is a linear transformation.
tr(FG) = tr(GF) for any two n x n m
Show that if A and B are similar, then tr
b. Find the matrix for T relative to the basis {1, t, t²,t³} for
P3 and the standard basis for R“.
26. It can be shown that the trace of a matrix
the eigenvalues of A. Verify this statemer
A is diagonalizable.
In Exercises 11 and 12, find the B-matrix for the transformation
X> Ax, where B = {b1, b2}.
27. Let V be R" with a basis B = {b1,...
with the standard basis, denoted here by
identity transformation I : R" → R", wE
the matrix for I relative to B and E. W
called in Section 4.4?
-4 -1
11. A =
Di =
b2 =
-6
28. Let V be a vector space with a basis B =
be the same space V with a basis C = {
be the identity transformation I :V →
for I relative to B and C. What was
12. A =
b, =
b, =
In Exercises 13–16, define T : R² → R² by T(x) = Ax. Find a
basis B for R2 with the property that [T]B is diagonal.
Section 4.7?
13. А %3D
14. A =
29. Let V be a vector space with a basis B
the B-matrix for the identity transform=
4
16. A =
15. A =
3
[M] In Exercises 30 and 31, find the B-mat
tion x→ Ax where B = {b,, b2, b3}.
17. Let A =
and B = {b1, b2}, for bi =
-1
2
6 -2 -2
30. A = | 3 1 -2
b, =
Define T : R2 → R² by T(x) = Ax.
2 -2
[1] 2
a. Verify that bị is an eigenvector of A but that A is not
diagonalizable.
[-1
b3 =
b1 =
1 , b2 =
1
-1
b. Find the B-matrix for T.
18. Define T :R³ → R³ by T(x) = Ax, where A is a 3 x 3
matrix with eigenvalues 5, 5, and -2. Does there exist a basis
B for R3 such that the B-matrix for T is a diagonal matrix?
T-7 -48 –16
1
31. A =
14
6.
-3 -45 -19
Discuss.
-3
Verify the statements in Exercises 19-24. The matrices are square.
b =
1, b2 =
1, b3 =
-3
19. If A is invertible and similar to B, then B is invertible
and A-1 is similar to B-1. [Hint: P-AP = B for some
32. [M] Let T be the transformation w
given below. Find a basis for R4 with
is diagonal.
invertible P. Explain why B is invertible. Then find an
invertible Q such that Q-A-Q = B¬1.]
-6
4
9.
20. If A is similar to B, then A² is similar to B2.
-3
0.
1
6.
21. If B is similar to A and C is similar to A, then B is similar
A =
-1
-2
1
0.
to C.
-4
4
0.
7
Transcribed Image Text:(p) = entries and is p(1) p(0) a. Show that T is a linear transformation. tr(FG) = tr(GF) for any two n x n m Show that if A and B are similar, then tr b. Find the matrix for T relative to the basis {1, t, t²,t³} for P3 and the standard basis for R“. 26. It can be shown that the trace of a matrix the eigenvalues of A. Verify this statemer A is diagonalizable. In Exercises 11 and 12, find the B-matrix for the transformation X> Ax, where B = {b1, b2}. 27. Let V be R" with a basis B = {b1,... with the standard basis, denoted here by identity transformation I : R" → R", wE the matrix for I relative to B and E. W called in Section 4.4? -4 -1 11. A = Di = b2 = -6 28. Let V be a vector space with a basis B = be the same space V with a basis C = { be the identity transformation I :V → for I relative to B and C. What was 12. A = b, = b, = In Exercises 13–16, define T : R² → R² by T(x) = Ax. Find a basis B for R2 with the property that [T]B is diagonal. Section 4.7? 13. А %3D 14. A = 29. Let V be a vector space with a basis B the B-matrix for the identity transform= 4 16. A = 15. A = 3 [M] In Exercises 30 and 31, find the B-mat tion x→ Ax where B = {b,, b2, b3}. 17. Let A = and B = {b1, b2}, for bi = -1 2 6 -2 -2 30. A = | 3 1 -2 b, = Define T : R2 → R² by T(x) = Ax. 2 -2 [1] 2 a. Verify that bị is an eigenvector of A but that A is not diagonalizable. [-1 b3 = b1 = 1 , b2 = 1 -1 b. Find the B-matrix for T. 18. Define T :R³ → R³ by T(x) = Ax, where A is a 3 x 3 matrix with eigenvalues 5, 5, and -2. Does there exist a basis B for R3 such that the B-matrix for T is a diagonal matrix? T-7 -48 –16 1 31. A = 14 6. -3 -45 -19 Discuss. -3 Verify the statements in Exercises 19-24. The matrices are square. b = 1, b2 = 1, b3 = -3 19. If A is invertible and similar to B, then B is invertible and A-1 is similar to B-1. [Hint: P-AP = B for some 32. [M] Let T be the transformation w given below. Find a basis for R4 with is diagonal. invertible P. Explain why B is invertible. Then find an invertible Q such that Q-A-Q = B¬1.] -6 4 9. 20. If A is similar to B, then A² is similar to B2. -3 0. 1 6. 21. If B is similar to A and C is similar to A, then B is similar A = -1 -2 1 0. to C. -4 4 0. 7
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