Question

DeMorgan’s theorem states that _________

(a) (AB)’ = A’ + B’

(b) (A + B)’ = A’ * B

(c) A’ + B’ = A’B’

(d) (AB)’ = A’ + B

The question was posed to me in an online quiz.

Asked question is from Boolean Logic Operations topic in section Boolean Algebra and Minimization Techniques and Logic Gates of Digital Circuits

Answer 1

The correct option is (a) (AB)’ = A’ + B’

Explanation: The DeMorgan’s law states that (AB)’ = A’ + B’ & (A + B)’ = A’ * B’, as per the Dual Property.