Write Boolean equation for the output of fig. and solve this equation for all possible input conditions.

Explanation

The Boolean equations for the output of fig.
(i)When A=0 B=0 then `Y=bar0+bar0`=1+1=1
(ii)When A=0, B=1 , then , `Y=bar0+bar1=1+0=1`
(iii) When A=1,B=0 then `Y=bar1+bar0= 0+1=1`
(iv)When A+1, B=1 , then `Y=bar1+bar1=0+0=0`
Hence `Y=bar(AB)`