# Shannons Expansion Theorem Help

Discussion in 'Homework Help' started by testing12, Oct 10, 2011.

1. ### testing12 Thread Starter Member

Jan 30, 2011
80
2
[LEFT][COLOR=black]Can someone please help me to understand how the function in 6.5 is realized. I do not understand how they obtain (w2 OR w3) term, are there some intermediate steps I am missing? [/COLOR]
[COLOR=#000000]Thnak you. [/COLOR]

[IMG]http://img841.imageshack.us/img841/3572/unledpsk.jpg[/IMG][/LEFT]

2. ### Maen Member

Sep 16, 2011
12
4
$f(w_1,w_2,w_3)=\overline{w_1}w_3+w_2\overline{w_3}
f(w_1,w_2,w_3)=\overline{w_1}\cdot f(w_1=0,w2,w3)+w_1\cdot f(w_1=1,w2,w3)$

Does sthis help?

testing12 likes this.
3. ### testing12 Thread Starter Member

Jan 30, 2011
80
2
yea i see it now, i had to work out another statement before I was able to see this. Thank you sir.