Question

The expression \( a = \overline{AB} \) is equal to:

• A. \( \overline{A} + \overline{B} \)
• B. \( AB + A \)
• C. \( A + B \)
• D. \( AB \)

Hint:

De Morgan: \( \overline{AB} = \overline{A} + \overline{B},\quad \overline{A + B} = \overline{A} \cdot \overline{B} \)

Answer 1

The Correct Option is A

Apply De Morgan's Theorem: \[ \overline{AB} = \overline{A} + \overline{B} \]