Question

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

Answer 1

Answer:

an = (1 + 2·(n - 1))/2^(n - 1) = 2^(1 - n)·(2·n - 1)

sn = 6 - 2·0.5^n·(2·n + 3)