Grant Garza
04/10/2024 · Senior High School

2) a) Calcular el determinante de la siguiente matriz: \( \quad A=\left(\begin{array}{lll}0 & 1 & 0 \\ 1 & 4 & 2 \\ 0 & 3 & 1\end{array}\right) \) b) Es A invertible? Justifique. En caso de ser invertible halle su inversa. c) Cuál es el rango de A? Resolver el sistema \( A \cdot X=B \), siendo \( B=\left(\begin{array}{c}-1 \\ 0 \\ 5\end{array}\right) \) d) Justifique porqué un sistema homogéneo de m ecuaciones y n incógnitas, no puede ser incompatible.

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a) El determinante de \( A \) es -1. b) \( A \) es invertible y su inversa es \( A^{-1} = \begin{pmatrix} 2 & 1 & -2 \\ 1 & 0 & 0 \\ -3 & 0 & 1 \end{pmatrix} \). c) El rango de \( A \) es 3. d) Un sistema homogéneo siempre tiene al menos una solución, que es la solución trivial, por lo que no puede ser incompatible.

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