Question

Determine os elementos da matriz

A=5 3 4
2 2 0
0-1 5
A12=
A=31
A=23

Answer 1

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

$A=\left[\begin{array}{ccc}5&3&4\\2&2&0\\0&-1&5\end{array}\right]$

$a_{12}=3\\\\a_{31}=0\\\\a_{23}=0$