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#1 2012-12-11 06:59:20

jacks
Full Member

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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 (2012-12-11 06:59:38)

#2 2012-12-11 07:46:45

bobbym
Administrator

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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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