Question

resolva o sistema linear
2x + 3y + z = 11
x + y + z = 6
5x + 2y + z = 18

Answer 1

Resposta

x+y+z= 6

y - z = -1

-3y - 2z = -12

3L2 + L3

3y - 3z = -3

-3y - 2z = -12

-5z = -15

z = 3

y - z = -1

y = -1 + z

y = 2

x = 6 - y - z

x = 6 - 2 - 3

x = 1

S = { 1,2,3 }