Question

Aplicando a regra de sarrus,calcule os determinantes
a) 2 1 -2
3 -1 0
4 1 -3

Answer 1

| 2 1 -2| 2 1
| 3 -1 0| 3 -1
| 4 1 -3| 4 1

det = 6 - 6 + 9 - 8
det = 0 + 1
det = 1