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Introductory Linear Algebra: An Applied First Course, 8/E
Bernard Kolman, DrexelUniversity David R. Hill, Temple University
ISBN: 0-13-143740-2 Publisher: Prentice Hall Copyright: 2005 Format: Cloth; 768 pp
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Help downloading Instructor Resources Instructor's Manual, 8/E by Dennis Kletzing © 2005 | Paper; 214 pages | ISBN: 0131437410 | Status: Instock Chapter 1--Instructor's Solutions Manual (.2 MB | pdf file | Type: Manuals/Guides)
Introductory Linear Algebra (Mathematics) Linear Algebra (Engineering: Mechanical)Chapter 2--Instructor's Solutions Manual (.1 MB | pdf file | Type: Manuals/Guides)
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Chapter 1
Linear Equations and Matrices
Section 1.1, p. 8
2. x = 1, y = 2, z = −2. 4. No solution. 6. x = 13 + 10z, y = −8 − 8z, z = any real number. 8. No solution. 10. x = 2, y = −1. 12. No solution. 14. x = −1, y = 2, z = −2. 16. (c) Yes. (d) Yes.
18. x = 2, y = 1, z = 0. 20. There is no such value of r. 22. Zero, infinitely many, zero. 24. 1.5 tons of regular and 2.5 tonsof special plastic. 26. 20 tons of 2-minute developer and a total of 40 tons of 6-minute and 9-minute developer. 28. $7000, $14,000, $3000. T.1. The same numbers sj satisfy the system when the pth equation is written in place of the qth equation and vice versa. T.2. If s1 , s2 , . . . , sn is a solution to (2), then the ith equation of (2) is satisfied: ai1 s1 +ai2 s2 +· · ·+ain sn = bi . Then forany r = 0, rai1 s1 + rai2 s2 + · · · + rain sn = rbi . Hence s1 , s2 , . . . , sn is a solution to the new system. Conversely, for any solution s1 , s2 , . . . , sn to the new system, rai1 s1 +· · ·+rain sn = rbi , and dividing both sides by nonzero r we see that s1 , . . . , sn must be a solution to the original linear system. T.3. If s1 , s2 , . . . , sn is a solution to (2), then the pth andqth equations are satisfied: ap1 s1 + · · · apn = bp aq1 s1 + · · · aqn = bq .
2 Thus, for any real number r, (ap1 + raq1 )s1 + · · · + (apn + raqn )sn = bp + rbq
Chapter 1
and so s1 , . . . , sn is a solution to the new system. Conversely, any solution to the new system is also a solution to the original system (2). T.4. Yes; x = 0, y = 0 is a solution for any values of a, b, c, and d.Section 1.2, p. 19
2. a = 3, b = 1, c = 8, d = −2. ⎡ ⎤ 5 −5 8 7 −7 2 9⎦. 4. (a) C + E = E + C = ⎣4 (b) Impossible. (c) . 0 1 5 3 4 ⎤ ⎡ ⎡ ⎤ −9 3 −9 0 10 −9 (d) ⎣−12 −3 −15⎦. (e) ⎣ 8 −1 −2⎦. (f) Impossible. −6 −3 −9 −5 −4 3 ⎡ ⎤ ⎡ ⎤ 1 2 5 4 5 1 2 3 1⎦, (AT )T = 2 3⎦. . (b) ⎣−5 (c) 6. (a) AT = ⎣2 2 1 4 3 4 8 9 4 ⎡ ⎤ 3 4 0 −4 17 2 3⎦. (d) . (e) ⎣6 (f) . 4 0 −16 6 9 10 1 0 1 0 3 0 +1 = . 0 1 0 0 0 2 ⎡⎤ λ − 1 −2 −3 10. ⎣ −6 λ + 2 −3 ⎦. −2 λ − 4 −5 8. Yes: 2 12. (a) 0 0 . 1 1 (b) 1 1 . 1 0 (c) 1 1 . 0 1 (d) 0 1 . 0 1 (e) 1 1 . 0 1
−6 11
10 . 17
14. v = 0 0 0 0 . T.1. Let A and B each be diagonal n × n matrices. Let C = A + B, cij = aij + bij . For i = j, aij and bij are each 0, so cij = 0. Thus C is diagonal. If D = A − B, dij = aij − bij , then dij = 0. Therefore D is diagonal. T.2....
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