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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) A.P."," (b) G.P."],[" (c) H.P."," (d) None of these "]]

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