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The values of alpha for which the system...

The values of `alpha` for which the system of equations
x+y+z=1
`x+2y+4z+alpha`
`x+4y+10z=alpha^2` is consistent, are

A

`1,-2`

B

`-1,2`

C

1,2

D

None of these

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The correct Answer is:
D
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