Which of the following is De-Morgan’s law?
A. P ∧ (Q v R) Ξ (P ∧ Q) v (P ∧ R)
B. ~(P ∧ R) Ξ ~P v ~R, ~(P v R) Ξ ~P ∧ ~R
C. P v ~P Ξ True, P ∧ ~P Ξ False
D. None of the mentioned
Answer:B
Which of the following is De-Morgan’s law?
A. P ∧ (Q v R) Ξ (P ∧ Q) v (P ∧ R) B. ~(P ∧ R) Ξ ~P v ~R, ~(P v R) Ξ ~P ∧ ~R C. P v ~P Ξ True, P ∧ ~P Ξ False D. None of the mentioned
Explanation: Definition of De–Morgan’s Law.