Thomas' Calculus and Linear Algebra and Its Applications Package for the Georgia Institute of Technology, 1/e
5th Edition
ISBN: 9781323132098
Author: Thomas, Lay
Publisher: PEARSON C
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Chapter 3.2, Problem 7E
Find the determinants in Exercises 5–10 by row reduction to echelon form.
7.
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Chapter 3 Solutions
Thomas' Calculus and Linear Algebra and Its Applications Package for the Georgia Institute of Technology, 1/e
Ch. 3.1 - Compute |5722030458030506|.Ch. 3.1 - Compute the determinants in Exercises 18 using a...Ch. 3.1 - Compute the determinants in Exercises 18 using a...Ch. 3.1 - Compute the determinants in Exercises 18 using a...Ch. 3.1 - Compute the determinants in Exercises 18 using a...Ch. 3.1 - Compute the determinants in Exercises 18 using a...Ch. 3.1 - Compute the determinants in Exercises 18 using a...Ch. 3.1 - Compute the determinants in Exercises 18 using a...Ch. 3.1 - Compute the determinants in Exercises 18 using a...Ch. 3.1 - Compute the determinants in Exercises 914 by a...
Ch. 3.1 - Compute the determinants in Exercises 914 by a...Ch. 3.1 - Compute the determinants in Exercises 914 by a...Ch. 3.1 - Compute the determinants in Exercises 914 by...Ch. 3.1 - Compute the determinants in Exercises 914 by...Ch. 3.1 - Compute the determinants in Exercises 914 by...Ch. 3.1 - The expansion of a 3 3 determinant can be...Ch. 3.1 - The expansion of a 3 3 determinant can be...Ch. 3.1 - The expansion of a 3 3 determinant can be...Ch. 3.1 - The expansion of a 3 3 determinant can be...Ch. 3.1 - In Exercises 1924, explore the effect of an...Ch. 3.1 - In Exercises 1924, explore the effect of an...Ch. 3.1 - In Exercises 1924, explore the effect of an...Ch. 3.1 - In Exercises 1924, explore the effect of an...Ch. 3.1 - In Exercises 1924, explore the effect of an...Ch. 3.1 - In Exercises 1924, explore the effect of an...Ch. 3.1 - Compute the determinants of the elementary...Ch. 3.1 - Compute the determinants of the elementary...Ch. 3.1 - Compute the determinants of the elementary...Ch. 3.1 - Compute the determinants of the elementary...Ch. 3.1 - Compute the determinants of the elementary...Ch. 3.1 - Compute the determinants of the elementary...Ch. 3.1 - Use Exercises 2528 to answer the questions in...Ch. 3.1 - Use Exercises 2528 to answer the questions in...Ch. 3.1 - In Exercises 3336, verify that det EA = (det...Ch. 3.1 - In Exercises 3336, verify that det EA = (det...Ch. 3.1 - In Exercises 3336, verify that det EA = (det...Ch. 3.1 - In Exercises 3336, verify that det EA = (det...Ch. 3.1 - Let A = [3142] Write 5A. Is det 5A = 5 det A?Ch. 3.1 - Let .A = [abcd] and let k be a scalar. Find a...Ch. 3.1 - In Exercises 39 and 40, A is an n n matrix. Mark...Ch. 3.1 - a. The cofactor expansion of det A down a column...Ch. 3.1 - Let u = [30] and v = [12]. Compute the area of the...Ch. 3.1 - Let u = [ab] and v = [c0], where a, b, and c are...Ch. 3.2 - PRACTICE PROBLEMS 1. Compute |13122512045131068|...Ch. 3.2 - Use a determinant to decide if v1, v2, and v3 are...Ch. 3.2 - Let A be an n n matrix such that A2 = I. Show...Ch. 3.2 - Each equation in Exercises 14 illustrates a...Ch. 3.2 - Each equation in Exercises 14 illustrates a...Ch. 3.2 - Each equation in Exercises 14 illustrates a...Ch. 3.2 - Each equation in Exercises 14 illustrates a...Ch. 3.2 - Find the determinants in Exercises 510 by row...Ch. 3.2 - Find the determinants in Exercises 510 by row...Ch. 3.2 - Find the determinants in Exercises 510 by row...Ch. 3.2 - Find the determinants in Exercises 510 by row...Ch. 3.2 - Find the determinants in Exercises 510 by row...Ch. 3.2 - Find the determinants in Exercises 510 by row...Ch. 3.2 - Combine the methods of row reduction and cofactor...Ch. 3.2 - Combine the methods of row reduction and cofactor...Ch. 3.2 - Combine the methods of row reduction and cofactor...Ch. 3.2 - Combine the methods of row reduction and cofactor...Ch. 3.2 - Find the determinants in Exercises 1520, where 15....Ch. 3.2 - Find the determinants in Exercises 1520, where 16....Ch. 3.2 - Find the determinants in Exercises 1520, where...Ch. 3.2 - Find the determinants in Exercises 1520, where...Ch. 3.2 - Find the determinants in Exercises 1520, where...Ch. 3.2 - Find the determinants in Exercises 1520, where...Ch. 3.2 - In Exercises 2123, use determinants to find out if...Ch. 3.2 - In Exercises 2123, use determinants to find out if...Ch. 3.2 - In Exercises 2123, use determinants to find out if...Ch. 3.2 - In Exercises 2426, use determinants to decide if...Ch. 3.2 - In Exercises 2426, use determinants to decide if...Ch. 3.2 - In Exercises 2426, use determinants to decide if...Ch. 3.2 - In Exercises 27 and 28, A and B are n n matrices....Ch. 3.2 - a. If three row interchanges are made in...Ch. 3.2 - Compute det B4 where B = [101112121]Ch. 3.2 - Use Theorem 3 (but not Theorem 4) to show that if...Ch. 3.2 - Show that if A is invertible, then detA1=1detA.Ch. 3.2 - Suppose that A is a square matrix such that det A3...Ch. 3.2 - Let A and B be square matrices. Show that even...Ch. 3.2 - Let A and P be square matrices, with P invertible....Ch. 3.2 - Let U be a square matrix such that UTU = 1. Show...Ch. 3.2 - Find a formula for det(rA) when A is an n n...Ch. 3.2 - Verify that det AB = (det A)(det B) for the...Ch. 3.2 - Verify that det AB = (det A)(det B) for the...Ch. 3.2 - Let A and B be 3 3 matrices, with det A = 3 and...Ch. 3.2 - Let A and B be 4 4 matrices, with det A = 3 and...Ch. 3.2 - Prob. 41ECh. 3.2 - Let A = [1001] and B = [abcd]. Show that det(A +...Ch. 3.2 - Verify that det A = det B + det C, where A =...Ch. 3.2 - Right-multiplication by an elementary matrix E...Ch. 3.3 - Let S be the parallelogram determined by the...Ch. 3.3 - Use Cramers rule to compute the solutions of the...Ch. 3.3 - Use Cramers rule to compute the solutions of the...Ch. 3.3 - Use Cramers rule to compute the solutions of the...Ch. 3.3 - Use Cramers rule to compute the solutions of the...Ch. 3.3 - Use Cramers rule to compute the solutions of the...Ch. 3.3 - Use Cramers rule to compute the solutions of the...Ch. 3.3 - In Exercises 710, determine the values of the...Ch. 3.3 - In Exercises 710, determine the values of the...Ch. 3.3 - In Exercises 710, determine the values of the...Ch. 3.3 - In Exercises 710, determine the values of the...Ch. 3.3 - In Exercises 1116, compute the adjugate of the...Ch. 3.3 - In Exercises 1116, compute the adjugate of the...Ch. 3.3 - In Exercises 1116, compute the adjugate of the...Ch. 3.3 - In Exercises 1116, compute the adjugate of the...Ch. 3.3 - In Exercises 1116, compute the adjugate of the...Ch. 3.3 - In Exercises 1116, compute the adjugate of the...Ch. 3.3 - Show that if A is 2 2, then Theorem 8 gives the...Ch. 3.3 - Suppose that all the entries in A are integers and...Ch. 3.3 - In Exercises 1922, find the area of the...Ch. 3.3 - In Exercises 1922, find the area of the...Ch. 3.3 - In Exercises 1922, find the area of the...Ch. 3.3 - In Exercises 19-22, find the area of the...Ch. 3.3 - Find the volume of the parallelepiped with one...Ch. 3.3 - Find the volume of the parallelepiped with one...Ch. 3.3 - Use the concept of volume to explain why the...Ch. 3.3 - Let T : m n be a linear transformation, and let p...Ch. 3.3 - Let S be the parallelogram determined by the...Ch. 3.3 - Repeat Exercise 27 with b1=[47], b2=[01], and...Ch. 3.3 - Find a formula for the area of the triangle whose...Ch. 3.3 - Let R be the triangle with vertices at (x1, y1),...Ch. 3.3 - Let T: 3 3 be the linear transformation...Ch. 3.3 - Let S be the tetrahedron in 3 with vertices at the...Ch. 3 - Mark each statement True or False. Justify each...Ch. 3 - Use row operations to show that the determinants...Ch. 3 - Use row operations to show that the determinants...Ch. 3 - Prob. 4SECh. 3 - Compute the determinants in Exercises 5 and 6. 5....Ch. 3 - Compute the determinants in Exercises 5 and 6. 6....Ch. 3 - Show that the equation of the line in 2 through...Ch. 3 - Prob. 8SECh. 3 - Exercise 9 and 10 concern determinants of the...Ch. 3 - Let f(t) = det V, with x1, x2, and x3 all...Ch. 3 - Find the area of the parallelogram determined by...Ch. 3 - Use the concept of area of a parallelogram to...Ch. 3 - Prob. 13SECh. 3 - Let A,B,C,D, and I be n n matrices. Use the...Ch. 3 - Let A, B, C, and D be n n matrices with A...Ch. 3 - Let J be the n n matrix of all 1s, and consider A...Ch. 3 - Prob. 17SE
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- In Exercises 5–8, use the definition of Ax to write the matrix equation as a vector equation, or vice versa. 5. 5 1 8 4 -2 -7 3 −5 5 -1 3 -2 = -8 - [18] 16arrow_forwardIn Exercises 5–8, use the definition of to write the matrix equation as a vector equation, or vice versa.arrow_forwardFind the inverses of the matrices in Exercises 1–4.arrow_forward
- In Exercises 13–18, perform each matrix row operation and write the new matrix. -6 4| 10 13. 1 5 -5 3 4 7 -12 6 9 40 3. 14. 1 -4 7|4 2 0 -1 |7 1 3 -3 15. 1 -3R, + R, -2 -1 -9- -9- 16. 3 3 -1 10 -3R + R2 1 3 5 1 -1 1 1 3. 1 -2 -1 17. 2 4| 11 -2R, + R3 5 1 6. -5R, + R4 1 -5 2 -2 4 -3 -1 18. 3 2 -1 -3R + R3 -4 4 2-3 4R, + R4 -len すす 2. 1. 2. 1. 3.arrow_forwardPlease help. This problem involves finding the matrix product. Thank you.arrow_forwardEvaluate each determinant in Exercises 1-10. 1. 5 7 2. 4 5 6 8 3 3. -4 1 4. 7 9. 6. -2 -5 5. -7 14 1 3 -4 -8 2 7. -5 8. -2 9. 10. 2 6. 2. 2. -IN-10arrow_forward
- Unless otherwise specified, assume that all matrices in these exercises are nxn. Determine which of the matrices in Exercises 1–10 are invertible. Use as few calculations as possible. Justify your answersarrow_forward12.) Find the determinant of A = -2 3 1 -1 2 0 2 1 0 -2 1 * * 3 -3 4 Show your work.arrow_forwardEvaluate each determinant in Exercises 27–32. 27. 13 0 28. 4 3 2 2 1 1 -5 -1 4 2 -1 -3 5 29. 3 1 30. 2 -4 2 -3 4 -1 3. -5 4 1 1 2 3| 31. 2 2 32. -3 -3 4 -5 N 22N 3. लarrow_forward
- 3. row Compute the determinant of the matrix. Show all your work including which operations and cofactor expansions you are performing. ow!! ! NOO 0 4 1 -1 0 4 -3 1 -2arrow_forwardIn Exercises 8–19, calculate the determinant of the given matrix. Use Theorem 3 to state whether the matrix is singular or nonsingulararrow_forwardQuestion 9. Solve ans show work. thanksarrow_forward
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