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1 LISTA DE EXERCÍCIOS Nº 1 - RESOLUÇÃO Curso: Engenharia de Produção Disciplina: Álgebra Linear Professor: João Furtado Turma: EP2NA Data: 12/08/2015 Aluno: Gerson C. Santos Nos problemas de 1 a 3, calcular os valores de “m” e “n” para que as matrizes “A” e “B” sejam iguais: 1) 75 15 75 38 15 8 75 15 12 3 8 1 6 3 1 5 8 75 12 3 2 3 2 7 3 3 6 1 n nn n n n n A B n 2) 2 2 2 2 2 2 2 2 41 1340 4 40 41 6 36 3 4 13 40 41 81 81 9 1 41 1340 4 6 3 4 9 36 3 9 3 m n m n m m n m m n A B ` 3) 2 2 2 2 1 2 2 2 7 8 7 8 10 25 10 25 0 4 4 10 25 ( 1, 10, 25) 4 ( 10) 4(1)(25) 100 100 0 7 8 7 8 4 4 0 0 10 0 5 2 5 10 02 5 10 5 2 2 x x x x x x a b c b A B ac r b r x a x x r Dadas as matrizes abaixo: 2 3 8 5 7 9 0 9 8 4 1 6 0 4 1 1 4 6 A B C 4) Calcular A+B: 2 3 8 5 7 9 2 5 3 ( 7) 8 ( 9) 7 4 1 4 1 6 0 4 1 4 0 1 4 6 1 4 3 5 5) Calcular B+C: 5 7 9 0 9 8 5 0 7 9 9 8 5 2 1 0 4 1 1 4 6 0 1 4 4 1 6 1 8 7 6) Calcular A+C: 2 3 8 0 9 8 2 0 3 9 8 8 2 12 16 4 1 6 1 4 6 4 1 1 4 6 6 5 3 0 2 7) Calcular A-B: 2 3 8 5 7 9 2 5 3 ( 7) 8 ( 9) 3 10 17 4 1 6 0 4 1 4 0 1 4 6 1 4 5 7 8) Calcular A-C: 2 3 8 0 9 8 2 0 3 9 8 8 2 6 0 4 1 6 1 4 6 4 1 1 4 6 6 3 5 12 9) Calcular B-C: 5 7 9 0 9 8 5 0 7 9 9 8 5 16 17 0 4 1 1 4 6 0 1 4 4 1 6 1 0 5 10) Calcular X=4A-3B+5C: 2 3 8 5 7 9 0 9 8 8 12 32 15 21 27 0 45 40 4 3 5 4 1 6 0 4 1 1 4 6 16 4 24 0 12 3 5 20 30 8 15 0 12 ( 21) 45 32 ( 27) 40 7 78 99 16 0 5 4 12 20 24 3 30 21 4 3 X X 11) Calcular X=2B-3A-6C: 5 7 9 2 3 8 0 9 8 10 14 18 6 9 24 0 54 48 2 3 6 0 4 1 4 1 6 1 4 6 0 8 2 12 3 18 6 24 36 10 6 0 14 9 54 18 24 48 4 77 90 0 12 6 8 ( 3) 24 2 ( 18) 36 18 13 16 X X 12) Calcular X=4C+2A-6B: 0 9 8 2 3 8 5 7 9 0 36 32 4 6 16 30 42 54 4 2 6 1 4 6 4 1 6 0 4 1 4 16 24 8 2 12 0 24 6 0 4 30 36 6 ( 42) 32 16 ( 54) 26 84 102 4 8 0 16 ( 2) 24 24 ( 12) 6 12 10 6 X X Nos problemas de 13 a 15, efetuar a multiplicação das matrizes “A” e “X”. 13) (2,1)(2,2) (2,1) 2 62 6 5 2 6 5 4 5 44 x x y A x A X X xy y y 14) 1 1 2 3 (3,1) 2 1 (3,3 1) (3,1) 2 2 3 3 1 2 33 1 2 3 2 3 2 5 7 2 5 7 3 9 8 3 9 1 2 3 2 5 7 3 9 8 8 x x x x AX x x x x x x x x x A X x x 3 15) 1 2 (4,1) 3 4 1 2 3 4 2 3 4 (4,1) 1 2 3 4 1 1 2 (4,4) (4,1) 2 3 4 3 4 3 4 2 8 0 1 3 6 2 4 5 7 9 9 8 6 3 4 2 8 3 3 4 2 8 0 1 3 6 2 4 5 7 9 9 8 6 2 4 5 7 9 6 9 8 6 x x A x x AX x x x x x x x x x A X x x X x x x x x x x x Dadas as matrizes: 1 2 1 7 3 8 3 1 1 3 5 7 2 4 3 1 1 3 7 4 6 2 8 3 3 5 4 1 9 0 5 9 5 3 2 3 A B C D 16) Calcular AB: (4,2) (2,4) (4,4) 1 2 3 1 1 3 5 7 7 4 6 2 8 3 5 9 1 1 ( 2) 6 1 3 ( 2) 2 1 ( 5) ( 2) ( 8) 1 ( 7) ( 2) 3 3 1 1 6 3 3 1 2 3 ( 5) 1 ( 8) 3 ( 7) 1 3 7 1 ( 4) 6 7 3 ( 4) 2 7 ( 5) ( 4) ( 8) 7 ( 7) ( 4) 3 5 1 9 6 A B AB 11 1 11 13 9 11 23 18 17 13 3 61 5 3 9 2 5 ( 5) 9 ( 8) 5 ( 7) 9 3 59 33 97 8 17) Calcular (AB)D: (4,2) (2,4) (4,4) (4,4) (4,4) 1 2 11 1 11 13 3 1 1 3 5 7 9 11 23 18 7 4 6 2 8 3 17 13 3 61 5 9 59 33 97 8 11 1 11 13 1 7 3 8 9 11 23 18 3 1 1 3 17 13 3 61 4 1 9 0 59 33 97 8 5 3 2 3 A B AB AB D [ 11 1 ( 1) ( 3) 11 4 ( 13) 5] [ 11 [ 11 3 ( 1) ( 1) 11 9 ( 13) 2 ] [ 11 ( 8) ( 1) ( 3) 11 0 ( 13) ( 3)] [9 1 11 ( 3) ( 23) 4 ( 18) 5] [9 7 11 ( 1) ( 23) 1 ( 18) (4,4)( )AB D [9 3 11 ( 1) ( 23) [9 ( 8) 11 ( 3) ( 23) 0 ( 18) ( 3)] [ 17 1 13 ( 3) ( 3) 4 ( 61) 5] [ 17 7 13 ( 1) ( 3) 1 ( 61) 3] [ 17 3 13 ( 1) ( 3) 9 ( 61) 2] [ 17 ( 8) 13 ( 3) ( 3) 0 ( 61) ( 3)] [59 1 33 ( 3) ( 97) 4 ( 8) 5] [59 7 33 ( 1) ( 97 ) 1 ( 8) 3] [59 3 33 ( 1) ( 97 ) 9 ( 8) 2] [59 (4,4) 29 104 41 130 206 25 227 51 ( ) 373 318 213 280 468 259 745 547 AB D 4 18) Calcular A(BD): [1 1 3 ( 3) ( 5) 4 ( 7) 5] [1 7 3 ( 1) ( 5) 1 ( 7) 3] [1 [1 ( 8) 3 ( 3) ( 5) 0 ( 7) ( 3)] [6 1 2 ( 3) ( 8) 4 3 (2,4) (4,4) (2,4) 1 7 3 8 1 3 5 7 3 1 1 3 6 2 8 3 4 1 9 0 5 3 2 3 B D BD 5] [6 7 2 ( 1) ( 8) 1 3 3] [6 3 2 ( 1) ( 8) 9 3 2] [6 ( 8) 2 ( 3) ( 8) 0 3 ( 3)] (4,2) (2,4) (4,4) 1 2 3 1 63 22 59 4 7 4 17 41 50 63 5 9 [1 [1 [1 ( 59) (BD) A BD A ( 2) ( 50)] [1 4 ( 2) ( 63)] [3 ( 63) 1 ( 17)] [3 ( 22) 1 41] [3 ( 59) 1 ( 50)] [3 4 1 ( 63)] [7 ( 63) ( 4) ( 17)] [7 ( 22) ( 4) 41] [7 ( 59) ( 4) ( 50)] [7 4 ( 4) ( 63)] [5 ( 63) 9 ( 17)] [5 ( 22) 9 41] [5 ( 59) (4,4) 9 ( 50)] [5 4 9 ( 63)] 29 104 41 130 206 25 227 51 (BD) 373 318 213 280 468 259 745 547 A 19) Calcular BA: (2,4) (4,2) (2,2) (2,2) 1 2 1 3 5 7 3 1 6 2 8 3 7 4 5 9 [1 1 3 3 ( 5) 7 ( 7) 5] [1 ( 2) 3 1 ( 5) [6 1 2 3 ( 8) 7 3 5] [6 ( 2) 2 1 ( 8) ( 4) 3 9] 60 42 29 49 B A BA BA 20) Calcular (BA)C: (2,4) (4,2) (2,2) (2,2) (2,2) (2,2) ( 1 2 1 3 5 7 3 1 60 42 6 2 8 3 7 4 29 49 5 9 60 42 2 4 ( 60) 2 ( 42) ( 3) ( 60) 4 ( 42) 5 (BA)C 29 49 3 5 ( 29) 2 49 ( 3) ( 29) 4 49 5 (BA)C B A BA BA C 2,2) 6 450 205 129 5 21) Calcular B(AC): (4,2) (2,2) (4,2) (2,4) (4, 1 2 1 4 ( 2) 5 8 6 3 1 2 4 3 2 1 ( 3) 3 3 17 7 4 3 5 7 2 ( 4) ( 3) 7 4 ( 4) 5 26 8 5 9 5 2 9 ( 3) 5 4 9 5 17 65 1 3 5 7 6 2 8 3 A C AC B AC [1 8 3 [1 ( 6) 3 17 ( 5) 8 ( 7) 65] [6 8 2 3 ( 8) 26 3 ( 17)] [6 ( 6) 2 17 ( 8) 8 3 65]2) (2,2) (2,2) 8 6 3 17 ( ) 26 8 17 65 6 450 ( ) 205 129 B AC B AC Nos problemas 22 a 24, verificar se a matriz B é inversa da matriz A. 22) (3,3) (3,3) (3,3) [( 0, 5) ( 12) ( 1, 5) 2 1 ( 2)] [( 0, 5) ( 4) ( 1, 5) 0 1 ( 2)] [( 0, 5) [( 0, 5) ( 12) ( 2, 5) 2 0, 5 ( 2)] 0,5 1,5 1 12 4 14 0,5 2,5 0,5 2 0 2 0,5 2 1 2 2 4 A B B A [( 0, 5) ( 4) ( 2, 5) 0 0, 5 ( 2)] [( 0, 5) 14 ( 2, 5) ( 2) 0, 5 4)] [( 0, 5) ( 12) ( 2) 2 1 ( 2)] [( 0, 5) ( 4) ( 2) 0 1 ( 2)] [( 0, 5) 14 ( 2) ( 2) 1 4] 1 0 0 1 0 1 0 (3,3) 0 0 1 AB I B A 23) (3,3) (3,3 (3, ) 3) [( 2) ( 1, 5) ( 4) 2 ( 6) ( 1)] [( 2) 2 ( 4) ( 2, 5) ( 6) 1] [( 2) ( 1, 5) ( 4) 1, 5 ( 6) [( 4) ( 1, 5) ( 6) 2 ( 6) ( 1 2 4 6 1,5 2 1,5 4 6 6 2 2,5 1,5 4 4 2 1 1 0,5 A B AB )] [( 4) 2 ( 6) ( 2, 5) ( 6) 1] [( 4) 1, 5) ( 6) 1, 5 ( 6) ( 0, 5)] [( 4) ( 1, 5) ( 4) 2 ( 2) ( 1)] [( 4) 2 ( 4) ( 2, 5) ( 2) [( 4) ( 1, 5) ( 4) 1, 5 ( 2) ( 0, 5)] 1 0 0 1 0 1 0 (3,3) 0 0 1 AB I B A 24) (3,3) (3 (3,3) ,3) [( 4) ( 1) ( 2) 1, 5 0 ( 5, 5)] [( 4) 1 ( 2) ( 2) 0 6, 5] [( 4) ( 0, 5) ( 2) 1 0 ( 3, 5)] [2 ( 1) ( 6) 1, 5 ( 2) ( 5, 5)] [2 1 ( 6) 4 2 0 1 1 0,5 2 6 2 1,5 2 1 10 8 4 5,5 6,5 3,5 A B AB ( 2) ( 2) 6, 5] [2 ( 0, 5) ( 6) 1 ( 2) ( 3, 5)] [10 ( 1) ( 8) 1, 5 ( 4) ( 5, 5)] [10 1 ( 8) [10 ( 0, 5) ( 8) 1 ( 4) ( 3, 5) 1 0 0 1 0 1 0 (3,3) 0 0 1 AB I B A
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