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UNIVERSIDAD DE CONCEPCION
FACULTAD DE CIENCIAS
FISICAS Y MATEMATICAS
DEPARTAMENTO DE INGENIERIA MATEMATICA
ALGEBRA Y ALGEBRA LINEAL 520142
Solucion Listado 12 (Determinantes)
1. a) det(A) = 4, det(A1) = 14
b) det(A) = 12, det(A1 = 112
c) det(A) = 6, det(A1) = 16
2. a) det(A5) = 32, b) det(A)(1)n2, c) det(2A1)2n1, d) det(AAt) =4.
3. a) det(A) = 5n.
b) det(2A 3B) = 2n+ 12 3na.c) det(A) = 0 o det(A) = 5
2n.
4. Solo = 1 satisface lo requerido.
9. a) k R {1;2}, b) k R {0}, c) k R {12}.
10. a) r(A) = 2, b) r(B) = 2, c) r(C) = 2.
11. a) r(A) = 3 si k R {1;2}, r(A) = 2 si k = 2, r(A) = 1 si k = 1.b) idem a).c) r(C) = 3 si k 6= 0, r(C) = 2 si k = 0, r(C) 6= 1 para todo k.
12. a) A1 =
1 1 12 1 1
5 4 3
b) B1 = 1
2
1 0 10 1 12 1 1
c) no existe.
13. A1 = 12
1 12 11 160 4 4 80 0 1 40 0 0 4
.
JSA/RBP/RRS/GBG/AGS/RNG/LRS/BBM/agsPrimer Semestre de 2005