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November 16th, 2016, 02:27 AM  #1 
Newbie Joined: Nov 2016 From: Texas Posts: 12 Thanks: 0  Set Theory and Simplification.
X and Y are two sets. Simplify the following: (Y − X)∩X Could somebody please help me with this question. I am really struggling with set theory. I understand that ∩ means "and", and "" is the relative complement (difference between sets). 
November 16th, 2016, 06:41 AM  #2  
Banned Camp Joined: Jun 2014 From: Earth Posts: 945 Thanks: 191  Quote:
I) X and Y are disjoint sets. II) X and Y partially overlap. III) X and Y are the same set. IV) Y is a proper subset of X. V) X is a proper subset of Y.  
November 16th, 2016, 01:27 PM  #3 
Global Moderator Joined: May 2007 Posts: 6,806 Thanks: 716  Step back and look at what it really means and you will see that it is empty. YX has no points of X and X consists of only points in X.


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