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The ordered pair (a, b), for which the system of linear equations 3x – 2y + z = b 5x – 8y + 9z = 3 2x + y + az = –1 has no solution, is :

1. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ 3 1 , 3
2. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 3 1 , 3
3. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − − 3 1 , 3
4. ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 3 1 , 3

Correct answer: ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − − 3 1 , 3

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