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If |(a,b,aalpha+b),(b,c,balpha+c),(a alp...

If `|(a,b,aalpha+b),(b,c,balpha+c),(a alpha+b,b alpha+c,0)|=0` then

A

a, b, c are in A.P.

B

a, b, c are in G.P.

C

a, b, c are in H.P.

D

`(x-alpha)` is a factor of `ax^(2)+2bx+c`

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B, D
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