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If a ,b ,a n dc are in G.P., then the eq...

If `a ,b ,a n dc` are in G.P., then the equations `a x^2+2b x+c=0a n ddx^2+2e x+f=0` have a common root if `d/c , e/b ,f/c` are in a. A.P. b. G.P. c. H.P. d. none of these

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