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is (a union symbol b) prime the same as

Mathematics
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(A' intersect B')

If so : 

Let U = {1,2,3,4,5,6,7}   A= {4,5,6.7}  B={1,5,7}

So if I understand set theory correctly and I am correct on my question the answer would be  {1,4,6}

is this correct?

Nov 2nd, 2014

(A∩B)' = A'  U B'

(AUB)' = {1,4,5,6,7}' = {2,3}

A'  ∩ B' = {4,5,6.7}'∩ {1,5,7}'

             ={1,2,3}∩ {2,3,4,}

            ={2,3} as before


Nov 3rd, 2014

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