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If a,b,c are in G.P., then the equations `ax^2+2bx+c =0` and `dx^2+2ex+f =0` have a 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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  3. If a,b,c are in G.P., then the equations ax^2+2bx+c =0 and dx^2+2ex+f ...

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