Question

Como cálculo dada a matrizes A=

A=| 2 5 |
| 3 -4 |

B=| 3 -2|
| 6 1|

C=| 3 -4|
| 2 5|

a) det A
b) det B
c) det A
d) det C

Answer 1

$A=\left[\begin{array}{cc}2&5\\3&-4\end{array}\right] = 2.-4 -5.3 = -8-15 = -23$

$B=\left[\begin{array}{cc}3&-2\\6&1\end{array}\right] = 3.1 -(-2).6 = 8+12 = 20$

$C=\left[\begin{array}{cc}3&-4\\2&5\end{array}\right] = 3.5 -(-4).2 = 15+8 = 23$


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