Introduction to Linear Algebra (Classic Version) (5th Edition) (Pearson Modern Classics for Advanced Mathematics Series)
5th Edition
ISBN: 9780134689531
Author: Lee Johnson, Dean Riess, Jimmy Arnold
Publisher: PEARSON
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Chapter 6.5, Problem 17E
To determine
To find:
The elementary matrices
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a
Question 7. If det d e f
ghi
V3
= 2. Find det
-1
2
Question 8. Let A = 1
4
5
0
3
2.
1 Find adj (A)
2 Find det (A)
3
Find A-1
2g 2h 2i
-e-f
-d
273
2a 2b 2c
Question 1. Solve the system
-
x1 x2 + 3x3 + 2x4
-x1 + x22x3 + x4
2x12x2+7x3+7x4
Question 2. Consider the system
= 1
=-2
= 1
3x1 - x2 + ax3
= 1
x1 + 3x2 + 2x3
x12x2+2x3
= -b
= 4
1 For what values of a, b will the system be inconsistent?
2 For what values of a, b will the system have only one solution?
For what values of a, b will the saystem have infinitely many solutions?
Question 5. Let A, B, C ben x n-matrices, S is nonsigular. If A = S-1 BS, show that
det (A) = det (B)
Question 6. For what values of k is the matrix A = (2- k
-1
-1
2) singular?
k
Chapter 6 Solutions
Introduction to Linear Algebra (Classic Version) (5th Edition) (Pearson Modern Classics for Advanced Mathematics Series)
Ch. 6.2 - In Exercises 1-8, evaluate the determinant of the...Ch. 6.2 - Prob. 2ECh. 6.2 - In Exercises 1-8, evaluate the determinant of the...Ch. 6.2 - Prob. 4ECh. 6.2 - Prob. 5ECh. 6.2 - In Exercises 1-8, evaluate the determinant of the...Ch. 6.2 - In Exercises 1-8, evaluate the determinant of the...Ch. 6.2 - Prob. 8ECh. 6.2 - In Exercises 9-14, calculate the cofactors...Ch. 6.2 - Prob. 10E
Ch. 6.2 - In Exercises 914, calculate the cofactors A11,...Ch. 6.2 - Prob. 12ECh. 6.2 - In Exercises 914, calculate the cofactors A11,...Ch. 6.2 - Prob. 14ECh. 6.2 - Prob. 15ECh. 6.2 - Prob. 16ECh. 6.2 - In Exercises 1520, use the results of Exercises...Ch. 6.2 - Prob. 18ECh. 6.2 - In Exercises 1520, use the results of Exercises...Ch. 6.2 - Prob. 20ECh. 6.2 - In Exercises 2124, calculate det(A)....Ch. 6.2 - Prob. 22ECh. 6.2 - In Exercises 2124, calculate det(A)....Ch. 6.2 - Prob. 24ECh. 6.2 - In Exercises 25 and 26, show that the quantities...Ch. 6.2 - In Exercises 25 and 26, show that the quantities...Ch. 6.2 - Prob. 27ECh. 6.2 - Prob. 28ECh. 6.2 - In Exercises 29 and 30, form the (33) matrix of...Ch. 6.2 - Prob. 30ECh. 6.2 - Prob. 31ECh. 6.2 - Prob. 32ECh. 6.2 - Let A=(aij) be a (22) matrix. Show that...Ch. 6.2 - Prob. 34ECh. 6.2 - Prob. 35ECh. 6.3 - In Exercises 1-6, use elementary column operations...Ch. 6.3 - Prob. 2ECh. 6.3 - In Exercises 1-6, use elementary column operations...Ch. 6.3 - Prob. 4ECh. 6.3 - In Exercises 1-6, use elementary column operations...Ch. 6.3 - Prob. 6ECh. 6.3 - Suppose that A=[A1,A2,A3,A4] is a (44) matrix,...Ch. 6.3 - Prob. 8ECh. 6.3 - Suppose that A=[A1,A2,A3,A4] is a (44) matrix,...Ch. 6.3 - Prob. 10ECh. 6.3 - Suppose that A=[A1,A2,A3,A4] is a (44) matrix,...Ch. 6.3 - Prob. 12ECh. 6.3 - In Exercises 1315, use only column interchanges to...Ch. 6.3 - Prob. 14ECh. 6.3 - Prob. 15ECh. 6.3 - Prob. 16ECh. 6.3 - In Exercises 1618, use elementary column...Ch. 6.3 - Prob. 18ECh. 6.3 - Use elementary row operations on the determinant...Ch. 6.3 - Repeat Exercise 19, using the determinant in...Ch. 6.3 - Repeat Exercise 19, using the determinant in...Ch. 6.3 - Find a (22) matrix A and a (22) matrix B, where...Ch. 6.3 - For any real number a, a0, show that...Ch. 6.3 - Let A=[A1,A2,A3] be a (33) matrix and set...Ch. 6.3 - Prob. 25ECh. 6.3 - Prob. 26ECh. 6.3 - Prob. 27ECh. 6.3 - Prob. 28ECh. 6.3 - Prob. 29ECh. 6.3 - Prob. 30ECh. 6.3 - Prob. 31ECh. 6.3 - Prob. 32ECh. 6.4 - In Exercises 1-3, use column operations to reduce...Ch. 6.4 - Prob. 2ECh. 6.4 - In Exercises 1-3, use column operations to reduce...Ch. 6.4 - Prob. 4ECh. 6.4 - In Exercises 4-6, use column operations to reduce...Ch. 6.4 - Prob. 6ECh. 6.4 - Let A and B be (33) matrices such that det(A)=2...Ch. 6.4 - Prob. 8ECh. 6.4 - In Exercises 9-14, find all values such that...Ch. 6.4 - In Exercises 9-14, find all values such that...Ch. 6.4 - In Exercises 9-14, find all values such that...Ch. 6.4 - Prob. 12ECh. 6.4 - In Exercises 9-14, find all values such that...Ch. 6.4 - Prob. 14ECh. 6.4 - In Exercises 15-21, use Cramers rule to solve the...Ch. 6.4 - Prob. 16ECh. 6.4 - In Exercises 15-21, use Cramers rule to solve the...Ch. 6.4 - Prob. 18ECh. 6.4 - In Exercises 15-21, use Cramers rule to solve the...Ch. 6.4 - In Exercises 15-21, use Cramers rule to solve the...Ch. 6.4 - In Exercises 15-21, use Cramers rule to solve the...Ch. 6.4 - Suppose that A is an (nn) matrix such that A2=I....Ch. 6.4 - Prob. 23ECh. 6.4 - Prob. 24ECh. 6.4 - Suppose that S is a nonsingular (nn) matrix, and...Ch. 6.4 - Suppose that A is (nn) and A2=A. What is det(A)?Ch. 6.4 - Prob. 27ECh. 6.4 - Prob. 28ECh. 6.4 - Prob. 29ECh. 6.4 - Prob. 30ECh. 6.5 - In Exercises 1-4, use row operations to reduce the...Ch. 6.5 - In Exercises 1-4, use row operations to reduce the...Ch. 6.5 - Prob. 3ECh. 6.5 - Prob. 4ECh. 6.5 - In Exercises 5-10, find the adjoint matrix for the...Ch. 6.5 - Prob. 6ECh. 6.5 - In Exercises 5-10, find the adjoint matrix for the...Ch. 6.5 - In Exercises 5-10, find the adjoint matrix for the...Ch. 6.5 - In Exercises 5-10, find the adjoint matrix for the...Ch. 6.5 - Prob. 10ECh. 6.5 - In Exercise11-16, calculate the Wronskian. Also,...Ch. 6.5 - Prob. 12ECh. 6.5 - In Exercise11-16, calculate the Wronskian. Also,...Ch. 6.5 - Prob. 14ECh. 6.5 - Prob. 15ECh. 6.5 - In Exercise11-16, calculate the Wronskian. Also,...Ch. 6.5 - Prob. 17ECh. 6.5 - Prob. 18ECh. 6.5 - Prob. 19ECh. 6.5 - In Exercises 17-20, find elementary matrices E1,...Ch. 6.5 - Prob. 21ECh. 6.5 - Prob. 22ECh. 6.5 - Prob. 23ECh. 6.5 - Prob. 24ECh. 6.5 - Prob. 25ECh. 6.5 - Prob. 26ECh. 6.5 - Prob. 27ECh. 6.5 - Prob. 28ECh. 6.5 - An (nn) matrix A is called skew symmetric if AT=A....Ch. 6.5 - Prob. 30ECh. 6.5 - Let A be an (nn) nonsingular matrix. Prove that...Ch. 6.5 - Prob. 32ECh. 6.SE - Prob. 1SECh. 6.SE - Prob. 2SECh. 6.SE - Prob. 3SECh. 6.SE - Prob. 4SECh. 6.SE - Prob. 5SECh. 6.SE - Prob. 6SECh. 6.SE - Prob. 7SECh. 6.SE - Prob. 8SECh. 6.CE - In Exercises 18, answer true or false. Justify...Ch. 6.CE - Prob. 2CECh. 6.CE - Prob. 3CECh. 6.CE - Prob. 4CECh. 6.CE - Prob. 5CECh. 6.CE - In Exercises 18, answer true or false. Justify...Ch. 6.CE - Prob. 7CECh. 6.CE - In Exercises 18, answer true or false. Justify...Ch. 6.CE - In Exercises 9-15, give a brief answer. Show that...Ch. 6.CE - In Exercises 9-15, give a brief answer. Let A and...Ch. 6.CE - In Exercises 9-15, give a brief answer. If A is an...Ch. 6.CE - In Exercises 915, give a brief answer. Let A and B...Ch. 6.CE - In Exercises 915, give a brief answer. If A is a...Ch. 6.CE - In Exercise 915, give a brief answer. aIf A and B...Ch. 6.CE - In Exercise 915, give a brief answer. If A=(aij)...
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