My Math Forum Discrete Math Simplifying

 Applied Math Applied Math Forum

 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: 6,343 Thanks: 534 Re: Discrete Math Simplifying First problem: B B-A 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: A-B ? 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:
 Originally Posted by mathman Second problem all space: A-B ? A, Therefore complement reverses the inequality. So the union contains A and its complement - all space.
So does that mean? the final result will be B?A when I simplify it?

March 18th, 2011, 03:08 PM   #5
Global Moderator

Joined: May 2007

Posts: 6,343
Thanks: 534

Re: Discrete Math Simplifying

Quote:
Originally Posted by compstudent
Quote:
 Originally Posted by mathman Second problem all space: A-B ? A, Therefore complement reverses the inequality. So the union contains A and its complement - all space.
So does that mean? the final result will be B?A when I simplify it?
No. The final result is the union of A and A' (complement), which is the entire set. You don't have a symbol for it.

 Tags discrete, math, simplifying

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post pjlloyd100 Applied Math 11 April 18th, 2013 11:03 AM OriaG Applied Math 5 February 11th, 2013 10:27 PM amyporter17 Applied Math 1 November 17th, 2010 07:23 AM rainysomber Applied Math 10 December 3rd, 2009 02:55 AM Arturo Applied Math 6 April 3rd, 2008 08:06 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top