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August 19th, 2009, 07:38 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, 11:06 AM  #2 
Senior Member Joined: Nov 2008 Posts: 199 Thanks: 0  Re: Help please. I am completely confused by this problem 

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