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#1 2012-12-11 06:59:20

jacks
Full Member

Offline

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

Online

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.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.

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