March 17th, 2011, 12:23 PM  #1 
Newbie Joined: Mar 2011 Posts: 3 Thanks: 0  Discrete Math Simplifying
I am in desperate need of help simplifying these. I have been working on these two questions for 3 days now. (B – A) U ( B ? A) _____ (A  B) U A 
March 17th, 2011, 12:48 PM  #2 
Global Moderator Joined: May 2007 Posts: 5,411 Thanks: 321  Re: Discrete Math Simplifying
First problem: B BA is all of B outside of A, while A?B is all of B inside A, so the union is B. Second problem all space: AB ? A, Therefore complement reverses the inequality. So the union contains A and its complement  all space. 
March 17th, 2011, 12:55 PM  #3 
Newbie Joined: Mar 2011 Posts: 3 Thanks: 0  Re: Discrete Math Simplifying
First off, thank you so much for replying Mathman. However, I am still confused Is it like distributing? I have been looking at my student manual and can only understand when I am given steps. But the questions I am having problems with does not have any sample steps. All of the ones in my student manual are all about U and not  Can you break it down to me barney style? I hope I pass this course. This is my first week in the class. 
March 17th, 2011, 12:59 PM  #4  
Newbie Joined: Mar 2011 Posts: 3 Thanks: 0  Re: Discrete Math Simplifying Quote:
 
March 18th, 2011, 03:08 PM  #5  
Global Moderator Joined: May 2007 Posts: 5,411 Thanks: 321  Re: Discrete Math Simplifying Quote:
 

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