# Truth Table

Discussion in 'Homework Help' started by Ace1stCav, Nov 6, 2010.

1. ### Ace1stCav Thread Starter New Member

Nov 6, 2010
2
0
I'm stuck on understanding the concept behind truth tables..Here is an example of a truth table I am trying to build...

M = A'BC + AB C + A BC + A BC + A B C

I have the initial part done, however I'm stuck filling in the "M" portion of the table. I have the table built, but huge formating issues when I try to post it. I'll attach the table as a jpg

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2. ### Ace1stCav Thread Starter New Member

Nov 6, 2010
2
0
Ok, I've got the table built...NOW, I have to create a Karnaugh Map, and NOT,AND,OR circut out of my findings..Attached is the "completed table."

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21.2 KB
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24
3. ### shteii01 AAC Fanatic!

Feb 19, 2010
4,527
718
I think your truth table is wrong. You are missing A'BC.

• ###### truth table.jpg
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19.7 KB
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22

Oct 30, 2010
14
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hi every body,
What is the main drawback of using truth table to prove the equality of Boolean functions?

5. ### shteii01 AAC Fanatic!

Feb 19, 2010
4,527
718
When you have many inputs, the table becomes huge. For three inputs you have 2^3=8 rows. Now consider four inputs, 2^4=16 rows. Now consider five inputs, 2^5=32 rows, and so on. Do you really want to fill a 32 row truth table by hand? Even on computer it is annoying.