Question

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

Answer 1

Answer:

every pair a, b in set B: (a+b)' = a'b', and (ab)' = a'+b'. Proof: Weshow that a+b and a'b' are complementary. In other words, we showthat both of the following are true (P4): (a+b)+(a'b') = 1, (a+b)(a'b') = 0.