Question

A solução deste sistema é: x+ 2y +z = 8 2x - y +z = 3 3x + y-z 2 (A) ((0, 2, 4). (B) (1, 2, 3). (C) {(1, 4, 5)). (D) ((1, 2, 6). (E) {(1, 4, 6).​

Answer 1

Resposta:

x + 2y + z = 8

2x - y + z = 3

3x + y - z = 2

1 + 2 . 2 + 3 = 8

1 + 4 + 3 = 8

5 + 3 = 8

8 = 8

2 . 1 - 2 + 3 = 3

2 - 2 + 3 = 3

2 + 1 = 3

3 = 3

3 . 1 + 2 - 3 = 2

3 + 2 - 3 = 2

3 - 1 = 2

2 = 2

(B) (1, 2, 3) x