Computer Science for IGCSE & O level - Boolean Logic (Section 5 - No. 42)
Which of the following represents De Morgan's law?
(A + B)' = A' + B'
(A + B)' = A' . B'
(A . B)' = A' + B'
(A . B)' = A' . B'
Explication
De Morgan's laws provides methods to simplify or transform logical expressions.