for the set X, with n elements; get the appropriate solution for:

a) sigma (|A|-1)^{2 }sum over all A (subsets of X).

b) sigma 2^{|A|}3^{|B|}sum over all A,B (subsets of X).

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- Feb 28th 2013, 01:58 AMmshouset ..
for the set X, with n elements; get the appropriate solution for:

a) sigma (|A|-1)^{2 }sum over all A (subsets of X).

b) sigma 2^{|A|}3^{|B|}sum over all A,B (subsets of X). - Feb 28th 2013, 12:03 PMemakarovRe: set ..
For a), you can use formulas (6a) and (6b) on this page.

- Feb 28th 2013, 01:03 PMmshouRe: set ..
i solved a) today afternoon. : )

thx

dont u have any idea about b) ?