30 votes 30 votes Let $f(A,B) = A'+B$. Simplified expression for function $f(f(x+y, y), z)$ is $x' + z$ $xyz$ $xy' + z$ None of the above Digital Logic gatecse-2002 digital-logic boolean-algebra normal + – Kathleen asked Sep 15, 2014 • edited Feb 10, 2018 by go_editor Kathleen 7.8k views answer comment Share Follow See 1 comment See all 1 1 comment reply Lakshman Bhaiya commented Apr 12, 2017 reply Follow Share C is a correct option 1 votes 1 votes Please log in or register to add a comment.
Best answer 40 votes 40 votes $f(f(x+y, y), z) = f((x+y)' +y), z)$ $=((x+y)' + y)' + z$ $= (x+y).y' + z (\because (a+b)' = a'.b')$ $= xy' + z$ Correct Answer: $C$ Arjun answered Dec 21, 2014 • edited May 20, 2019 by Naveen Kumar 3 Arjun comment Share Follow See all 0 reply Please log in or register to add a comment.