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#1 2006-05-14 11:28:10

Registered: 2006-01-27
Posts: 8

Help Please

Can anyone help me with Boolean Algebra
Does anyone understand this
or this
Find all ordered pairs (A, B) that satisfy the following expression: (A + B)' ((AB)')


#2 2006-05-14 18:47:40

Registered: 2005-12-04
Posts: 3,791

Re: Help Please

I've always hated boolean algebra, but only because I can never remeber whether plus or multiplication is and or or.


((A v B) ^ ~B) v (A ^ B)

The easiest way to do this is to make a truth table:

A | B
0 | 0
0 | 1
1 | 0
1 | 1

Then plug each of the values in.  For the first ordered pair (0,0), it would be:

((0+0)0') + 0*0 which is (0*1) + (0) which is 0.

Try the others, post your results here and we can check them for you.

"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."


#3 2006-05-18 02:20:47

Registered: 2006-05-18
Posts: 1

Re: Help Please

Can anyone help me to find some text about any matter (or topic) of mathematics. Because I have to write an essay and it should be about 2 pages long so that I could use it.


#4 2006-05-18 03:07:35

Registered: 2005-06-28
Posts: 18,631

Re: Help Please

Your seeking help on any topic in mathematics leaves a lot of options open. You haven't specified at what level of school/university you are.

However, I shall give some links on some interesting topics in mathematics, you may choose from these.

Pythagoras Theorem


Sieve of Eratosthenes


De Moivre's Theorem :- Use the hyperlinks given.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.


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