Question

In the Boolean algebra : $\overline{A}.\overline{B}=$ ......

• A. $\overline{A+B}$
• B. $A.B$
• C. $\overline{\overline{A}+\overline{B}}$
• D. $A+B$

Answer 1

The correct option is A $\overline{A+B}$

Input	$\overline{A}.\overline{B}$	$\overline{A+B}$	A.B	$\overline{\overline{A}+\overline{B}}$	A+B
$A=B=0$	1	1	0	0	0
$A=B=1$	0	0	1	1	1
$A=0,B=1$	0	0	0	1	1
$A=1,B=0$	0	0	0	1	1