Determinan dari $$$\left[\begin{array}{cc}1 & 3\\4 & 7\end{array}\right]$$$

Hitung $$$\left|\begin{array}{cc}1 & 3\\4 & 7\end{array}\right|$$$.

Determinan matriks 2x2 adalah $$$\left|\begin{array}{cc}a & b\\c & d\end{array}\right| = a d - b c$$$.

$$$\left|\begin{array}{cc}1 & 3\\4 & 7\end{array}\right| = \left(1\right)\cdot \left(7\right) - \left(3\right)\cdot \left(4\right) = -5$$$

$$$\left|\begin{array}{cc}1 & 3\\4 & 7\end{array}\right| = -5$$$A