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6 August, 06:51

Find the sum of nth term of the series 1+3/2+5/2^2+7/2^3 + ...

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  1. 6 August, 09:01
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    an = (1 + 2· (n - 1)) / 2^ (n - 1) = 2^ (1 - n) · (2·n - 1)

    sn = 6 - 2·0.5^n· (2·n + 3)
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