Truth Tables Help

From: BIGEYE (email_at_ddres.is.invalid)
Date: 10/14/04 

Date: Thu, 14 Oct 2004 19:31:43 +0100

My earlier post should read:
I have a four part question in a tutorial, parts 1 & 2 I don't have any
problem with. Parts 3 & 4 I have no idea what they mean. Can someone explain
to me what parts 3 & 4 mean and how can I answer the questions.
Alternatively if you can point me to a website that might be of some help.
The question:
Draw the truth tables for each of the following expressions:
1. AB'CD' + ABC'D' + A'BC'D + A'B'CD
2. (A + B' + C' + D)(A' + B + C + D')
3. Sigma m(2.5.6.9)
4. Pi M(0,7,10,11)

3 & 4 should read:
_
\
/_ m (2.5.6.9)

__
I I M (0,7,10,11)
Appreciate any help.
TIA

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