Hello:

I wonder how do you prove that the SUM of N / 2^N (N=1 to infinity) is N / (N-1)^2.

Thanks!

Results 1 to 7 of 7

- October 24th 2007, 12:32 PM #1

- Joined
- Oct 2007
- Posts
- 5

- October 24th 2007, 12:48 PM #2

- October 24th 2007, 01:01 PM #3

- Joined
- Oct 2007
- Posts
- 5

- October 24th 2007, 01:12 PM #4

- October 24th 2007, 01:13 PM #5

- Joined
- May 2006
- From
- Lexington, MA (USA)
- Posts
- 11,707
- Thanks
- 627

- October 24th 2007, 01:18 PM #6

- Joined
- Oct 2007
- Posts
- 5

- October 24th 2007, 01:34 PM #7