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

Explanation

The Boolean equation 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)`