Recent content by Lamarkiz

  1. L

    Proving the Convergence of ∑ n/2^n to 2

    Sorry, spent like 1 hour in it and still can't find it. I'm tired today, thanks for the help anyway. I'm going to try tomorrow.
  2. L

    Proving the Convergence of ∑ n/2^n to 2

    I did them in excel, found the following values. \sum_{n=0}^{+\infty}{\frac{n}{2^n}} = 2/1 \sum_{n=0}^{+\infty}{\frac{n}{3^n}} = 3/4 \sum_{n=0}^{+\infty}{\frac{n}{4^n}} = 4/9 \sum_{n=0}^{+\infty}{\frac{n}{5^n}} = 5/16 and on... So i figured out that i can find where any of...
  3. L

    Proving the Convergence of ∑ n/2^n to 2

    Sorry, can you be more specific please?
  4. L

    Proving the Convergence of ∑ n/2^n to 2

    I know that the following serie converges to 2 (did in excel), still I would like to know how i can prove it step by step it. ∞ ∑ n/2^n n=1 I tried (n+1)/(2^(n+1))/(n/2^n) still I'm finding 1/2, not the 2. Any thoughts?