Question

calcular o determinante das matrizes (aij)2x2  aij = i + 2 j

Answer 1

$\begin{bmatrix} x_{11} & x_{12} \\ x_{21} & x_{22} \end{bmatrix}\\\\ x_{11} = 1 + 2*1 = 3\\ x_{12} = 1 + 2*2 = 5\\ x_{21} = 2 + 2*1 = 4\\ x_{22} = 2 + 2*2 = 6\\ \boxed{\begin{bmatrix} 3 &5 \\ 4& 6 \end{bmatrix}}$
D = -5*4 + 3*6
D = -20 + 18
D = -2

Answer 2

Resposta:

[

x

11

x

21

x

12

x

22

]

x

11

=1+2∗1=3

x

12

=1+2∗2=5

x

21

=2+2∗1=4

x

22

=2+2∗2=6

[

3

4

5

6

]

D = -5*4 + 3*6

D = -20 + 18

D = -2