Question

construa a matriz quadrada de ordem 3, D=(dij)=i2-2j

Answer 1

a11 = 1 . 2 - 2 . 1 → 2 - 2 → 0
a12 = 1 . 2 - 2 . 2 → 2 - 4 → -2
a13 = 1 . 2 - 2 . 3 → 2 - 6 → -4
a21 = 2 . 2 - 2 . 1 → 4 - 2 → 2
a22 = 2 . 2 - 2 . 2 → 4 - 4 → 0
a23 = 2 . 2 - 2 . 3 → 4 - 6 → -2
a31 = 3 . 2 - 2 . 1 → 6 - 2 → 4
a32 = 3 . 2 - 2 . 2 → 6 - 4 → 2
a33 = 3 . 2 - 2 . 3 → 6 - 6 → 0

$\left[\begin{array}{ccc}0&-2&-4\\2&0&-2\\4&2&0\end{array}\right]$