$$$\left[\begin{array}{cc}4 & 6\\7 & 9\end{array}\right]$$$:n determinantti

Laskin laskee $$$2$$$x$$$2$$$-kokoisen neliömatriisin $$$\left[\begin{array}{cc}4 & 6\\7 & 9\end{array}\right]$$$ determinantin vaiheittain.

Aiheeseen liittyvä laskin: Kofaktorimatriisilaskin

Laske $$$\left|\begin{array}{cc}4 & 6\\7 & 9\end{array}\right|$$$.

2x2-matriisin determinantti on $$$\left|\begin{array}{cc}a & b\\c & d\end{array}\right| = a d - b c$$$.

$$$\left|\begin{array}{cc}4 & 6\\7 & 9\end{array}\right| = \left(4\right)\cdot \left(9\right) - \left(6\right)\cdot \left(7\right) = -6$$$

$$$\left|\begin{array}{cc}4 & 6\\7 & 9\end{array}\right| = -6$$$A

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