JEE Math Practice Question
Let the system of linear equations $$x + 2y + z = 2$$, $$\alpha x + 3y - z = \alpha $$, $$ - \alpha x + y + 2z = - \alpha $$ be inconsistent. Then $$\alpha$$ is equal to :
- A.$${5 \over 2}$$
- B.$$-$$$${5 \over 2}$$
- C.$${7 \over 2}$$
- D.$$-$$$${7 \over 2}$$
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