Q. Which of the following is not equal to 1 in Boolean algebra?
A) $\overline{A \bullet \overline{A}}$
B) $A \bullet \overline{A}$
C) $A + \overline{A}$
D) $A + 1$
Explanation
(b) $\overline{A \bullet \overline{A}} = \overline{A} + \overline{\overline{A}} = \overline{A} + A = 1$
$A \bullet \overline{A} = 0$
$A + \overline{A} = 1$
$A + 1 = 1$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.