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$$$\left[\begin{array}{cc}6 & 7\\8 & 9\end{array}\right]$$$ 的行列式
相關計算器: 代數餘子式矩陣計算器
您的輸入
計算 $$$\left|\begin{array}{cc}6 & 7\\8 & 9\end{array}\right|$$$。
解答
2x2 矩陣的行列式為 $$$\left|\begin{array}{cc}a & b\\c & d\end{array}\right| = a d - b c$$$。
$$$\left|\begin{array}{cc}6 & 7\\8 & 9\end{array}\right| = \left(6\right)\cdot \left(9\right) - \left(7\right)\cdot \left(8\right) = -2$$$
答案
$$$\left|\begin{array}{cc}6 & 7\\8 & 9\end{array}\right| = -2$$$A
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