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if `alpha,beta,gamma` are non-constant terms in G.P. and equations `alphax^(2)+2betax+gamma=0` and `x^(2)+x-1=0` has a common root then `(gamma-alpha).beta` is

A

0

B

`alpha beta`

C

`alpha gamma`

D

`beta gamma`

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The correct Answer is:
A
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