Correct the following boolean statements:
(1) X+1 = X
(2) (A’)’ = A’
(3) A+A’ = 0
(4) (A+B)’ = A.B
Answer:
1. X+1 = X (Annulment law)
X+0 = X (Identity law)
2. (A’)’ = A (Inversion law)
3. A+A’ = 1 (Complement law)
A.A’ = 0 (Complement law)
4. (A+B)’ = A’.B’ (DeMorgan’s second law)
