DeMorgan's law

Discussion in 'Homework Help' started by SAYED, Mar 29, 2007.

Mar 29, 2007
14
0
hallo
plesae help me

apple DeMorgan's law to find the complement of the folloing expession

2. Dave Retired Moderator

Nov 17, 2003
6,960
145
Two points:

1. Aquaint yourself with DeMorgan's Theorums.

2. Remember that you can apply the double-NOT function such that it will not change the expression, i.e. A => NOT gives A' => NOT gives A (where ' = NOT). This is very useful when applying DeMorgan's Theorums.

Dave

Mar 29, 2007
14
0
help me I'm don't understant this subject

thank you

4. thingmaker3 Retired Moderator

May 16, 2005
5,072
6
Did you read the information in the link? If you can cite the specific parts you are having trouble with, we can walk you through them.

Mar 29, 2007
14
0
is the ruslt right or no

6. thingmaker3 Retired Moderator

May 16, 2005
5,072
6
Almost... you dropped an "A"

Needs to be A(B'+C') instead of simply B'+C'

Otherwise, you got it right!

Mar 26, 2007
6
0
DEAR
you can use simple one law

( A . B )' = A' + B'

A( B. C' +(D.E)' )+ (B.F)' =

A( B. C' + D' + E' ) + B' + F' =

A . B . C' + A .D' + A .E' + B' + F'