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August 19th, 2009, 07:38 AM   #1
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Help please. I am completely confused by this problem

Can someone please explain this set theory problem to me.
(I am using U and n in replacement of the proper symbols since I do not know how to create them)
_given info___________
U= a,b,c,d,e,f,g,h,i,j,k
x=b,c,f,g,h,j
y=b,d,e,g,h
z=a,d,f,h,j
______________________

mymathlab says that

x U (z n y)' = a,b,c,e,f,g,h,i,j,k
why is that?
.
to me this would mean that b,c,f,g,h,j from x are in the answer
this would also mean that d,h from z n y are in the answer
buy why a,e,j,k? where do they come from?
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August 19th, 2009, 11:06 AM   #2
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Re: Help please. I am completely confused by this problem

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