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The system of equations alphax+y+z=alpha...

The system of equations `alphax+y+z=alpha-1, x+alphay+z=alpha-1, x+y+alphaz=alpha-1` has no solution if alpha is (A) 1 (B) not -2 (C) either -2 or 1 (D) -2

A

either -2 or 1

B

`-2`

C

1

D

not -2

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The correct Answer is:
B
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