Question

matrizes de A= (aij) de ordem3 tal que aij=i-j

Answer 1

$\left[\begin{array}{ccc} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22} & a_{23} \\ a_{31} & a_{32} & a_{33} \end{array}\right]$

Sendo:
$a_{ij} = i - j$

$a_{11} = 1 - 1 = 0$
$a_{12} = 1 - 2 = - 1$
$a_{13} = 1 - 3 = - 2$
$a_{21} = 2 - 1 = 1$
$a_{22} = 2 - 2 = 0$
$a_{23} = 2 - 3 = - 1$
$a_{31} = 3 - 1 = 2$
$a_{32} = 3 - 2 = 1$
$a_{33} = 3 - 3 = 0$

$\left[\begin{array}{ccc}0&-1&-2\\1&0&-1\\2&1&0\end{array}\right]$