Question

VAMOS APLICAR Represente graficamente cada sistema, em que xey são números reais. 1x + y = 2 2 x - 2y = 3 a) c) 2x - y = 4 2x + y = 6 у b) x - y = 2 1x - y = -1 y d) Ix - y = 0 = x + y = -3​

Answer 1

Resposta:

Explicação passo a passo:

Vamos resolver!

{

x

+

22y

=

-2

2x

+

21y

=

42

Δ

Δ

=

[

1

22

2

21

]

Diagonal 1 = 1  

×

21 = 21

Diagonal 2 = 22  

×

2 = 44

Δ

= Diagonal 1 - Diagonal 2

Δ

= 21-44

Δ

= -23

Δ

x

Δ

x

=

[

−2

22

42

21

]

Diagonal 1 = -2  

×

21 = -42

Diagonal 2 = 22  

×

42 = 924

Δ

x

= Diagonal 1 - Diagonal 2

Δ

x

= -42-924

Δ

x

= -966

Δ

y

Δ

y

=

[

1

−2

2

42

]

Diagonal 1 = 1  

×

42 = 42

Diagonal 2 = -2  

×

2 = -4

Δ

y

= Diagonal 1 - Diagonal 2

Δ

y

= 42-(-4)

Δ

y

= 46

x

=

Δ

x

Δ

=

−966

−23

=

42

y

=

Δ

y

Δ

=

46

−23

=

−2