My Math Forum Help please. I am completely confused by this problem
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 August 19th, 2009, 06:38 AM #1 Newbie   Joined: Aug 2009 Posts: 1 Thanks: 0 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?
 August 19th, 2009, 10:06 AM #2 Senior Member   Joined: Nov 2008 Posts: 199 Thanks: 0 Re: Help please. I am completely confused by this problem $\text{Is the set in the question supposed to be X \cup (U\setminus(Y \cap Z))? (U\setminus(Y \cap Z) might be written (Y \cap Z)^c or (Y \cap Z)' )? If so the answer is correct.}$

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