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#1 Re: Help Me ! » [Problem] Summation of a sequence » 2006-10-13 02:46:24
Thanks, Dross!
The only problem now is that I have to show the solution to a group of classmates who have no idea at all on induction.
but oh well, I've learned something new here.
Any other ways of solving it would be appreciated too!
#2 Help Me ! » [Problem] Summation of a sequence » 2006-10-12 23:28:28
- zaitsev
- Replies: 2
Hi all,
I need help with a "proving" math question and here it is:
working it out, I get:
the summation of 2^(r+1) - 2^r is workable, but I have no idea on the summation of r2^r part.
Maybe there is another better way to it? or the method of differences ( f(n) - f(0) ) should be applied here?
Any help would be much appreciated!
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