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Gate2018 cs Q23

23Which one of the following is a closed form expression for the generating function of the sequence {an}, where an = 2n + 3 for all n = 0, 1, 2,.....?
  • Option : D
  • Explanation : The Given functions is, an = 2n + 3
    generating function for 1 is and n is , the generating function for an is

    Which is option (D).
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