Ayuda pliz son ejercicios de matriz?

Hallar los Determinantes de las siguientes matrices :

• Matriz A.

<img src="https://tex.z-dn.net/?f=A%20%3D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-1%260%26-2%5C%5C4%26-5%266%5C%5C3%262%26-3%5Cend%7Barray%7D%5Cright%5D" /> – 1 0 – 2

A = 4 - 5 6 3 2 – 3

Resolviendo :

A = (– 1)( – 5)( – 3) + (0)(6)(3) + (– 2)(2)(4) – [(– 2)( – 5)(3) + (0)(4)( – 3) + (– 1)(2)(6)]

A = – 15 + 0 – 16 – (30 + 0 – 12)

A = – 31 – (18)

A = – 49

• Matriz B : <img src="https://tex.z-dn.net/?f=B%20%3D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D4%26-2%261%5C%5C5%263%264%5C%5C6%260%262%5Cend%7Barray%7D%5Cright%5D" />B = (4)(3)( – 2) + (– 2)(4)(6) + (1)(0)( – 5) – [(1)(3)(6) + (– 2)( – 5)( – 2) + (4)(0)(4)]

B = – 24 – 48 + 0 – [18 – 20 + 0]

B = – 72 – (– 2)

B = – 72 + 2

B = – 70

• Matriz C : – 2 0 – 1 – 4

C = 3 3 6 5 5 – 2 3 2 1 4 – 2 7

Se toma una columna y se antepone la cifra a la matriz 3 x 3 resultante teniendo cuidado de la alternancia de los signos comenzando por el positivo, independientemente del signo de la cifra respectiva.

Resolviendo :

Se toma la primera columna.

<img src="https://tex.z-dn.net/?f=-%282%29%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%266%265%5C%5C-2%263%262%5C%5C4%26-2%267%5Cend%7Barray%7D%5Cright%5D%20%20-%20%283%29%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D0%26-1%26-4%5C%5C-2%263%262%5C%5C4%26-2%267%5Cend%7Barray%7D%5Cright%5D%20%20%2B%20%285%29%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D0%26-1%26-4%5C%5C3%26-6%265%5C%5C4%26-2%267%5Cend%7Barray%7D%5Cright%5D%20-%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D0%26-1%26-4%5C%5C3%266%265%5C%5C-2%263%262%5Cend%7Barray%7D%5Cright%5D" />C = ( - 2){(3)(3)(7) + (6)(2)(4) + (5)( - 2) - (2) –[(5)(9)(4) + (6)( - 2)(7) + (3)(4)(2)]} – 3{(0)(3)(7) + ( - 1)(2)(4) + ( - 4)( - 2)( - 2) –[( - 4)(3)(4) + ( - 1)( - 2)(7) + (0)( - 2)(2)]} + 5{(0)( - 6)(7) + ( - 1)(5)(4) + (4)( - 2)(3) –[( - 4)( - 6)(4) + ( - 1)(3)(7) + (0)( - 2)(5)]} – {(0)(6)(2) + ( - 1)(5)( - 2) + ( - 4)(3)(3) –[( - 4)(6)( - 2) + ( - 1)(3)(2) + (0)(3)(5)]}

C = ( - 2){63 + 48 + 20 –[180 – 84 + 24]} – (3){0 – 8 – 16 –[ - 48 + 14 + 0]} + 5{0 – 20 – 24 –[96 – 21 + 0]} – {0 + 10 - 36 – [48 – 6 + 0]}

C = ( - 2){131 – [20]} – (3){ - 24 - [ - 34]} + (5){0 – 44 – [75]} – { - 26 – [42]}

C = ( - 2){111} – (3){10} + 5{119} – { - 68}

C = - 222 – 30 + 595 + 68

C = 411

Matriz D : 5 – 5 0 10

D = – 3 3 6 – 3 2 – 2 4 – 4 4 – 4 – 8 – 2

Se deja para que el interesado la resuelva para que fije los conocimientos aquí suministrados.