Use only DeMorgan's relationships and Involution to find the complements of the following functions:
a.) f(A,B,C,D) = [A+(BCD)'][(AD)'+B(C'+A)]
Demorgans (x1 + x2 + ... + xn)' = x1'x2'...xn'
Involution (x')' = x
The Attempt at a Solution
[[A+(BCD)'][(AD)'+B(C'+A)]]' to find the compliment, then using demorgans
[A+(BCD)']' + [(AD)'+B(C'+A)]'
[A'(BCD)] + (AD)[B(C'+A)]'
A'BCD + (AD)[B' + (C'+A)']
A'BCD + (AD)(B' + CA')
from here I don't know where to go, i would think the right side of the equation could turn to ADB' + ADCA' but i'm not sure, if it can ADCA' would just be 0 since AA' = 0. Don't know if I can do that though, just looking for some input and hopefully I didn't make a mistake towards the begining.