Truth Tables!!!

[skatingpigeon]

Can someone please help me???? I am stuck on a question in an assignemnt i have:

Using truth tables show that NOT(NOT A And B ) is equivalent to A Or Not B.

any help would be greatly appreciated!!!

Cheers

[gigemboy]

Is your question "what are truth tables" ?

http://www.rwc.uc.edu/koehler/comath/21.html

[Rassis]

If I right understood the symbols, here you have the answer. As you can see the last columns of each table are equal.

http://img474.imageshack.us/img474/2733/boole3an.th.jpg (http://img474.imageshack.us/my.php?image=boole3an.jpg)

Hope it helps.

Rui