Question Number 123965 by Khalmohmmad last updated on 29/Nov/20
![A= [((1 2 3)),((2 3 1)),((3 2 1)) ] det(M_(3×3) )=?](Q123965.png)
$${A}=\begin{bmatrix}{\mathrm{1}\:\:\:\mathrm{2}\:\:\:\:\:\mathrm{3}}\\{\mathrm{2}\:\:\:\mathrm{3}\:\:\:\:\:\mathrm{1}}\\{\mathrm{3}\:\:\:\:\mathrm{2}\:\:\:\:\mathrm{1}}\end{bmatrix} \\ $$$${det}\left({M}_{\mathrm{3}×\mathrm{3}} \right)=? \\ $$
Commented by MJS_new last updated on 29/Nov/20
$$\begin{vmatrix}{{a}}&{{b}}&{{c}}\\{{d}}&{{e}}&{{f}}\\{{g}}&{{h}}&{{i}}\end{vmatrix}={aei}+{bfg}+{cdh}−\left({afh}+{bdi}+{ceg}\right) \\ $$
Commented by JDamian last updated on 29/Nov/20
What is M?