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Determinante de $$$\left[\begin{array}{cc}1 & 2\\4 & 5\end{array}\right]$$$
Calculadora relacionada: Calculadora de matriz de cofactores
Tu entrada
Calcular $$$\left|\begin{array}{cc}1 & 2\\4 & 5\end{array}\right|$$$.
Solución
El determinante de una matriz 2x2 es $$$\left|\begin{array}{cc}a & b\\c & d\end{array}\right| = a d - b c$$$.
$$$\left|\begin{array}{cc}1 & 2\\4 & 5\end{array}\right| = \left(1\right)\cdot \left(5\right) - \left(2\right)\cdot \left(4\right) = -3$$$
Respuesta
$$$\left|\begin{array}{cc}1 & 2\\4 & 5\end{array}\right| = -3$$$A
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