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If a,b, c are in G.P., then the equation...

If a,b, c are in G.P., then the equations `ax^(2) + 2bx + c = 0 and dx^(2) + 2ex + f = 0` have common root if `(d)/(a), (e)/(b), (f)/(c)` are in

A

AP

B

GP

C

HP

D

None of these

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