Chandler Burns
01/11/2024 · Senior High School
3. Determinar si A es invartiblo empleando el mglodo del delerminanto y en caso de ser posible calcule \[ A=\left[\begin{array}{cccc}1 & 0 & -2 & 1 \\ 4 & -2 & 1 & -2 \\ 1 & 0 & -10 & 3 \\ -3 & 0 & 5 & -6\end{array}\right] \]
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Para determinar si la matriz \( A \) es invertible, podemos calcular su determinante. Si el determinante es diferente de cero, entonces la matriz es invertible.
La matriz \( A \) dada es:
\[ A=\left[\begin{array}{cccc}1 & 0 & -2 & 1 \\ 4 & -2 & 1 & -2 \\ 1 & 0 & -10 & 3 \\ -3 & 0 & 5 & -6\end{array}\right] \]
Para calcular el determinante de la matriz \( A \), primero debemos calcular el determinante de la matriz \( A \) utilizando el método de cofactores y cofactores adjuntos.
El determinante de una matriz \( 4 \times 4 \) se calcula de la siguiente manera:
\[ \text{det}(A) = a_{11}C_{11} + a_{12}C_{12} + a_{13}C_{13} + a_{14}C_{14} \]
Donde \( a_{ij} \) son los elementos de la matriz \( A \) y \( C_{ij} \) son los cofactores de los elementos de la matriz \( A \).
Calcularemos los cofactores de la matriz \( A \) y luego el determinante.
Matrices by following steps:
- step0: Evaluate the determinant:
\(\left[\begin{array}{rrrr}{1}&{0}&{-2}&{1}\\{4}&{-2}&{1}&{-2}\\{1}&{0}&{-10}&{3}\\{-3}&{0}&{5}&{-6}\end{array}\right]\)
- step1: Use the appropriate notation:
\(\left|\begin{array}{cc}{1}&{0}&{-2}&{1}\\{4}&{-2}&{1}&{-2}\\{1}&{0}&{-10}&{3}\\{-3}&{0}&{5}&{-6}\end{array}\right|\)
- step2: Use cofactor expansion along a column:
\(-0\times \left|\begin{array}{cc}{4}&{1}&{-2}\\{1}&{-10}&{3}\\{-3}&{5}&{-6}\end{array}\right|-2\times \left|\begin{array}{cc}{1}&{-2}&{1}\\{1}&{-10}&{3}\\{-3}&{5}&{-6}\end{array}\right|-0\times \left|\begin{array}{cc}{1}&{-2}&{1}\\{4}&{1}&{-2}\\{-3}&{5}&{-6}\end{array}\right|+0\times \left|\begin{array}{cc}{1}&{-2}&{1}\\{4}&{1}&{-2}\\{1}&{-10}&{3}\end{array}\right|\)
- step3: Multiply:
\(-0-2\times 26-0+0\)
- step4: Evaluate:
\(-0-52-0+0\)
- step5: Rewrite the expression:
\(0-52+0+0\)
- step6: Remove 0:
\(-52\)
El determinante de la matriz \( A \) es -52.
Como el determinante es diferente de cero, la matriz \( A \) es invertible.
Por lo tanto, la matriz \( A \) es invertible.
Quick Answer
El determinante de la matriz \( A \) es -52, por lo que la matriz es invertible.
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