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[" If "S" is the sum of infinity of "a" G.P.whose first term is 'a',then the sum of the first "n" terms is "],[[" (A) "s(1-(a)/(s))^(n)," (B) "S[1-(1-(a)/(s))^(n)]," (C) a "[1-(1-(a)/(s))^(n)]," (D) None of these "]]

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