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- scientia
- 2012-12-11 12:20:05
- bobbym
- 2012-12-11 07:46:45
Hi;
I am getting (n+1)! - 1 but I do not know of a proof of that.
- jacks
- 2012-12-11 06:59:20
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?