The sum of the first n terms of an arithmetic series is A, where A, = E(4r + 5) r=l (a) For this arithmetic series, find (i) the first term, (ii) the common difference. The sum of the first n terms of a geometric series is Gn where G, r=1 %3D (b) For this geometric series, find (i) the first term, (ii) the common ratio. (c) Find the value of n for which A14 – 6 = Gn

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