Question

aplicando a regra de Sarrus, calcule os determinadores:
a) | 3 2 -1 |
| 5 0 4 |
| 2 -3 1 |

B) | 2 1 -2 |
| 3 -1 0 |
| 4 1 -3 |

C) | A 0 0 |
| 0 B A |
| 0 1 1 |

Answer 1

$a) \left[\begin{array}{ccc}3&2&-1\\5&0&4\\2&-3&1\end{array}\right] -36+10-15-16 10-67 -57 b) \left[\begin{array}{ccc}2&1&-2\\3&-1&0\\4&1&-3\end{array}\right] 8-9-6+6 -1 c) \left[\begin{array}{ccc}A&0&0\\0&B&A\\0&1&1\end{array}\right] A^{2} - AB$