Question 480600: I am confused on how to do this
let
U= {1,2,3,4,5,6,7,8}
A= {1,2,4,5,8}
B= {2,3,4,6}
determine A'n B
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! i believe you are looking for A intersect B.
this means the elements that are common to both set A and set B.
since A = {1,2,4,5,8} and B = {2,3,4,6}, the elements that are in both A and B are {2,4}
i just notice that you are talking about A' rather than A.
A' is the elements that are not in A.
that's a different story.
we'll start again.
your givens are:
U= {1,2,3,4,5,6,7,8}
A= {1,2,4,5,8}
B= {2,3,4,6}
all 3 of these sets are involved.
the elements that are not in A would be the elements that are in U or in B, but not in A.
since the elements that are in A are {1,2,4,5,8}, then the elements that are not in A would be {3,6,7}
this makes a' = {3,6,7}
now you want the intersection of the elements that are not in A that are also in B.
look for any of {3,6,7} in B.
you see that A'^B = {3,6}
those are the elements that are not in A and that are also in B.
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