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#1 2012-12-10 07:59:20

jacks
Member
Registered: 2012-11-21
Posts: 128

sum of subsets

Consider all

non empty subsets  of the set
.

For every subset we find the product of each of these elements.

Sum of all these products is?

Last edited by jacks (2012-12-10 07:59:38)

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#2 2012-12-10 08:46:45

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,108

Re: sum of subsets

Hi;

I am getting (n+1)! - 1 but I do not know of a proof of that.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#3 2012-12-10 13:20:05

scientia
Member
Registered: 2009-11-13
Posts: 224

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