Question

Ajuda ?
Construa as matrizes :

A= (aij) 3x3 tal que aij = { 1, se i = j
0, se i ≠ j

Answer 1

$\left[\begin{array}{ccc}a_{11}&a_{12}&a_{13}\\a_{21}&a_{22}&a_{23}\\a_{31}&a_{32}&a_{33}\end{array}\right] \\ \\ a_{11} = 1 \\ a_{12} = 0 \\ a_{13} = 0 \\ a_{21} = 0 \\ a_{22} = 1 \\ a_{23} = 0 \\ a_{31} = 0 \\ a_{32} = 0 \\ a_{33} = 1 \\ \\ A = \left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]$