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[" If "(1)/(b-c)+(1)/(b-a)=(1)/(a)+(1)/(...

[" If "(1)/(b-c)+(1)/(b-a)=(1)/(a)+(1)/(c)],[" then "a,b,c" are in "],[[" (a) A.P."," (d) Hone of these "],[" (c) G.P."," (d) None of these "]]

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