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Question

0

550

1

+28

Evaluate the sum:

$\frac{1}{2^1} + \frac{2}{2^2} + \frac{3}{2^3} + \cdots + \frac{k}{2^k} + \cdots$

Guest · Answer 1 · 2020-10-16T02:10:25

sumfor(n, 1, 1000, (n/2^n))=It converges to 2

Partial sum formula =2^(-k) * (-k + 2^(k+1) - 2)