EBK ELEM.LINEAR ALGEBRA
12th Edition
ISBN: 9781119406778
Author: Anton
Publisher: WILEY CONS
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Textbook Question
Chapter 2.2, Problem 9E
In Exercises 9–14, evaluate the determinant of the matrix by first reducing the matrix to row echelon form and then using some combination of row operations and cofactor expansion.
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1) Express these large and small numbers from the Read and Study section in scientific
notation:
(a) 239,000 miles
(b) 3,800,000,000,000 sheets of paper
(c) 0.0000000000000000000000167 grams
2) Find all values for the variable x that make these equations true.
(a) 5x = 1
(b) 3x = 1/1
9
(c) 4* = 11/
4
(e) 4* = 64
(g) 10x = 1,000,000
(d) 3x=-3
(f) 2x =
=
8
(h) 10x = 0.001
(b)
4) Find an equation to fit each of the following graphs:
(a)
20
20
18
16
14
12
10
8
6
4
2
24
22
20
18
16
14
12
10
8
16
A
2
-3 -2
-1-0
2
3
4.
-1
0
1
2
3.
-2
-2
3) Which of the following are equivalent to 3? (There may be more than one that is
equivalent!)
-1
(a) (9)¯¹
3.
(b) (-3)-1
(c) (-3)
-1
(d) -(¯3)
(e) 11
3-1
(f) 3-4
Chapter 2 Solutions
EBK ELEM.LINEAR ALGEBRA
Ch. 2.1 - In Exercises 12, find all the minors and cofactors...Ch. 2.1 - In Exercises 12, find all the minors and cofactors...Ch. 2.1 - Let A=[41160033410144132] Find a. M13 and C13 b....Ch. 2.1 - Let A=[2311320332103214] Find a. M32 and C32 b....Ch. 2.1 - In Exercises 58, evaluate the determinant of the...Ch. 2.1 - In Exercises 58, evaluate the determinant of the...Ch. 2.1 - In Exercises 58, evaluate the determinant of the...Ch. 2.1 - In Exercises 58, evaluate the determinant of the...Ch. 2.1 - In Exercises 914, use the arrow technique of...Ch. 2.1 - In Exercises 914, use the arrow technique of...
Ch. 2.1 - In Exercises 914, use the arrow technique of...Ch. 2.1 - In Exercises 914, use the arrow technique of...Ch. 2.1 - In Exercises 914, use the arrow technique of...Ch. 2.1 - In Exercises 914, use the arrow technique of...Ch. 2.1 - In Exercises 1518, find all values of for which...Ch. 2.1 - In Exercises 1518, find all values of for which...Ch. 2.1 - In Exercises 1518, find all values of for which...Ch. 2.1 - In Exercises 1518, find all values of for which...Ch. 2.1 - Evaluate the determinant in Exercise 13 by a...Ch. 2.1 - Evaluate the determinant in Exercise 12 by a...Ch. 2.1 - In Exercises 2126, evaluate det(A) by a cofactor...Ch. 2.1 - In Exercises 2126, evaluate det(A) by a cofactor...Ch. 2.1 - In Exercises 2126, evaluate det(A) by a cofactor...Ch. 2.1 - In Exercises 2126, evaluate det(A) by a cofactor...Ch. 2.1 - In Exercises 2126, evaluate det(A) by a cofactor...Ch. 2.1 - In Exercises 2126, evaluate det(A) by a cofactor...Ch. 2.1 - In Exercises 2732, evaluate the determinant of the...Ch. 2.1 - In Exercises 2732, evaluate the determinant of the...Ch. 2.1 - In Exercises 2732, evaluate the determinant of the...Ch. 2.1 - In Exercises 2732, evaluate the determinant of the...Ch. 2.1 - In Exercises 2732, evaluate the determinant of the...Ch. 2.1 - In Exercises 2732, evaluate the determinant of the...Ch. 2.1 - In each part, show that the value of the...Ch. 2.1 - Show that the matrices A=[ab0c]andB=[de0f] commute...Ch. 2.1 - By inspection, what is the relationship between...Ch. 2.1 - Show that det(A)=12|tr(A)1tr(A2)tr(A)| for every 2...Ch. 2.1 - What can you say about an nth-order determinant...Ch. 2.1 - What is the maximum number of zeros that a 3 3...Ch. 2.1 - Explain why the determinant of a matrix with...Ch. 2.1 - prove that (x1, y1), (x2, y2), and (x3, y3) are...Ch. 2.1 - Prove that the equation of the line through the...Ch. 2.1 - Prove that if A is upper triangular and Bij is the...Ch. 2.1 - A matrix in which the entries in each row (or in...Ch. 2.1 - In parts (a)(j) determine whether the statement is...Ch. 2.1 - In parts (a)( j) determine whether the statement...Ch. 2.1 - In parts (a)(j) determine whether the statement is...Ch. 2.1 - In parts (a)(j) determine whether the statement is...Ch. 2.1 - In parts (a)(j) determine whether the statement is...Ch. 2.1 - In parts (a)(j) determine whether the statement is...Ch. 2.1 - In parts (a)( j) determine whether the statement...Ch. 2.1 - In parts (a)(j) determine whether the statement is...Ch. 2.1 - In parts (a)(j) determine whether the statement is...Ch. 2.1 - In parts (a)(j) determine whether the statement is...Ch. 2.2 - In Exercises 14, verify that det(A) = det(AT)...Ch. 2.2 - In Exercises 14, verify that det(A) = det(AT)....Ch. 2.2 - In Exercises 14, verify that det(A) = det(AT)...Ch. 2.2 - In Exercises 14, verify that det(A) = det(AT)....Ch. 2.2 - In Exercises 58, find the determinant of the given...Ch. 2.2 - In Exercises 58, find the determinant of the given...Ch. 2.2 - In Exercises 58, find the determinant of the given...Ch. 2.2 - In Exercises 58, find the determinant of the given...Ch. 2.2 - In Exercises 914, evaluate the determinant of the...Ch. 2.2 - In Exercises 914, evaluate the determinant of the...Ch. 2.2 - In Exercises 914, evaluate the determinant of the...Ch. 2.2 - In Exercises 914, evaluate the determinant of the...Ch. 2.2 - In Exercises 914, evaluate the determinant of the...Ch. 2.2 - In Exercises 914, evaluate the determinant of the...Ch. 2.2 - In Exercises 1522, evaluate the determinant, given...Ch. 2.2 - In Exercises 1522, evaluate the determinant, given...Ch. 2.2 - In Exercises 1522, evaluate the determinant, given...Ch. 2.2 - In Exercises 1522, evaluate the determinant, given...Ch. 2.2 - In Exercises 1522, evaluate the determinant, given...Ch. 2.2 - In Exercises 1522, evaluate the determinant, given...Ch. 2.2 - In Exercises 1522, evaluate the determinant, given...Ch. 2.2 - In Exercises 1522, evaluate the determinant, given...Ch. 2.2 - Use row reduction to show that...Ch. 2.2 - Verify the formulas in parts (a) and (b) and then...Ch. 2.2 - In Exercises 2528, confirm the identities without...Ch. 2.2 - In Exercises 2528, confirm the identities without...Ch. 2.2 - In Exercises 2528, confirm the identities without...Ch. 2.2 - In Exercises 2528, confirm the identities without...Ch. 2.2 - In Exercises 2930, show that det (A) = 0 without...Ch. 2.2 - In Exercises 2930, show that det (A) = 0 without...Ch. 2.2 - It can be proved that if a square matrix M is...Ch. 2.2 - It can be proved that if a square matrix M is...Ch. 2.2 - Let A be an n n matrix, and let B be the matrix...Ch. 2.2 - Find the determinant of the following matrix....Ch. 2.2 - In parts (a)(f) determine whether the statement is...Ch. 2.2 - In parts (a)(f) determine whether the statement is...Ch. 2.2 - In parts (a)(f) determine whether the statement is...Ch. 2.2 - In parts (a)(f) determine whether the statement is...Ch. 2.2 - In parts (a)(f) determine whether the statement is...Ch. 2.2 - In parts (a)(f) determine whether the statement is...Ch. 2.3 - In Exercises 14, verify that det(kA) = kn det(A)....Ch. 2.3 - In Exercises 14, verify that det(kA) = kn det(A)....Ch. 2.3 - In Exercises 14, verify that det (kA) = kn det...Ch. 2.3 - In Exercises 14, verify that det (KA) = Kn det(A)....Ch. 2.3 - In Exercises 56, verify that det (AB) = det (BA)...Ch. 2.3 - In Exercises 56, verify that det(AB) = det(BA) and...Ch. 2.3 - In Exercises 714, use determinants to decide...Ch. 2.3 - In Exercises 714, use determinants to decide...Ch. 2.3 - In Exercises 714, use determinants to decide...Ch. 2.3 - In Exercises 714, use determinants to decide...Ch. 2.3 - In Exercises 714, use determinants to decide...Ch. 2.3 - In Exercises 714, use determinants to decide...Ch. 2.3 - In Exercises 714, use determinants to decide...Ch. 2.3 - In Exercises 714, use determinants to decide...Ch. 2.3 - In Exercises 1518, find the values of k for which...Ch. 2.3 - In Exercises 1518, find the values of k for which...Ch. 2.3 - In Exercises 1518, find the values of k for which...Ch. 2.3 - In Exercises 1518, find the values of k for which...Ch. 2.3 - In Exercises 1923, decide whether the matrix is...Ch. 2.3 - In Exercises 1923, decide whether the matrix is...Ch. 2.3 - In Exercises 1923, decide whether the matrix is...Ch. 2.3 - In Exercises 1923, decide whether the matrix is...Ch. 2.3 - In Exercises 1923, decide whether the matrix is...Ch. 2.3 - In Exercises 2429, solve by Cramers rule, where it...Ch. 2.3 - In Exercises 2429, solve by Cramers rule, where it...Ch. 2.3 - In Exercises 2429, solve by Cramers rule, where it...Ch. 2.3 - In Exercises 2429, solve by Cramers rule, where it...Ch. 2.3 - In Exercises 2429, solve by Cramers rule, where it...Ch. 2.3 - In Exercises 2429, solve by Cramers rule, where it...Ch. 2.3 - Show that the matrix A=[cossin0sincos0001] is...Ch. 2.3 - Use Cramers rule to solve for the unknown y...Ch. 2.3 - Let Ax = b be the system in Exercise 31 a. Solve...Ch. 2.3 - Let A=[abcdefghi] Assuming that det(A) = 7, find...Ch. 2.3 - In each part, find the determinant given that A is...Ch. 2.3 - In each part, find the determinant given that A is...Ch. 2.3 - Prove that a square matrix A is invertible if and...Ch. 2.3 - Prove that if A is a square matrix, then det(AT) =...Ch. 2.3 - Let Ax = b be a system of n linear equations in n...Ch. 2.3 - Prove that if det(A) = 1 and all the entries in A...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - In parts (a)(l) determine whether the statement is...Ch. 2.3 - Prob. 12TFCh. 2 - In Exercises 18, evaluate the determinant of the...Ch. 2 - In Exercises 18, evaluate the determinant of the...Ch. 2 - In Exercises 18, evaluate the determinant of the...Ch. 2 - In Exercises 18, evaluate the determinant of the...Ch. 2 - In Exercises 18, evaluate the determinant of the...Ch. 2 - In Exercises 18, evaluate the determinant of the...Ch. 2 - In Exercises 18, evaluate the determinant of the...Ch. 2 - In Exercises 18, evaluate the determinant of the...Ch. 2 - Evaluate the determinants in Exercises 36 by using...Ch. 2 - a. Construct a 4 4 matrix whose determinant is...Ch. 2 - Use the determinant to decide whether the matrices...Ch. 2 - Use the determinant to decide whether the matrices...Ch. 2 - In Exercises 1315, find the given determinant by...Ch. 2 - In Exercises 1315, find the given determinant by...Ch. 2 - In Exercises 1315, find the given determinant by...Ch. 2 - Solve for x. |x131x|=|1032x613x5|Ch. 2 - In Exercises 1724, use the adjoint method (Theorem...Ch. 2 - In Exercises 1724, use the adjoint method (Theorem...Ch. 2 - In Exercises 1724, use the adjoint method (Theorem...Ch. 2 - In Exercises 1724, use the adjoint method (Theorem...Ch. 2 - In Exercises 1724, use the adjoint method (Theorem...Ch. 2 - In Exercises 1724, use the adjoint method (Theorem...Ch. 2 - In Exercises 1724, use the adjoint method (Theorem...Ch. 2 - In Exercises 1724, use the adjoint method (Theorem...Ch. 2 - Use Cramers rule to solve for x and y in terms of...Ch. 2 - Use Cramers rule to solve for x and y in terms of...Ch. 2 - By examining the determinant of the coefficient...Ch. 2 - Let A be a 3 3 matrix, each of whose entries is 1...Ch. 2 - a. For the triangle in the accompanying figure,...Ch. 2 - Use determinants to show that for all real values...Ch. 2 - Prove: If A is invertible, then adj(A) is...Ch. 2 - Prove: If A is an n n matrix, then...Ch. 2 - Prove: If the entries in each row of an n n...Ch. 2 - a. In the accompanying figure, the area of the...Ch. 2 - Use the fact that 21375, 38798, 34162, 40223,...Ch. 2 - Without directly evaluating the determinant, show...
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