Question

Matrizes: A= (Aij) 2x3 tal que ij =2i-j, Ai E (1; 2) Aj E (1, 2, 3)

Answer 1

$\begin{vmatrix}a_{11}&a_{12}&a_{13}\\a_{21}&a_{22}&a_{23}\end{vmatrix}$

$a_{ij}=2i-j\\\\a_{11}=2\cdot1-1\to1\\a_{12}=2\cdot1-2\to0\\a_{13}=2\cdot1-3\to-1\\a_{21}=2\cdot2-1\to3\\a_{22}=2\cdot2-2\to2\\a_{23}=2\cdot2-3\to1$

$\begin{vmatrix}1&0&-1\\3&2&1\end{vmatrix}$