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

The system of equations
`alphax+y+z=alpha-1,`
`x+alphay+z=alpha-1`
`x+y+alphaz=alpha-1`
and has no solution if `alpha` is

A

not -2

B

1

C

-2

D

Either -2 or 1

Text Solution

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The correct Answer is:
C
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  • The system of equations ax+y+z=a-1,x+ay+z=a-1andx+y+az=a-1 does not have unique solution if a = ……..

    A
    1 or -2
    B
    3
    C
    2
    D
    `-1`

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