Question

sistema linear 50 pontos!
x+y-2z=-2
2x-y-6z=4
x-y-2z=4

nao precisa explicar.​

Answer 1

|| 1 1 -2 || || x || || -2||

|| 2 -1 -6|| || y || = || 4 ||

|| 1 -1 -2|| || z || || 4 ||

x+y-2z = -2

2x -y -6z = 4

x -y -2z = 4

x+y-2z =-2

0x -3y -2z = 8

x-y-2z = 4

x+y-2z = -2

0x +y +⅔z = -8/3

x-y-2z = 4

x+y-2z = -2

0x +y +⅔z = -8/3

0x -2y 0z = 6

-2y = 6

y = -3

-3 +⅔z = -8/3

-9 +2z = -8

z = ½

x-3-1 = -2

x -4 = -2

x = 2

x = 2

y = -3

z = ½

Bo verificar, agora da certo.

2-3-2.½ = -2

2 -4 = -2

-2 = -2

2.2 +3 -3 = 4

4 = 4

2+3-½.2 = 4

2+3-1 = 4

5-1=4

4=4