Multiple choice

To implement $F= A \bar B+ AB \bar C + ABCD + ABC \bar D$ using only two input NAND gates, the minimum number of gates required is

  1. 8

  2. 0

  3. 2

  4. 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$A \bar B+ AB \bar C + ABC(D + \bar D) \Rightarrow A \bar B+ ABC = A \bar B+ AB( C + \bar C)$ $\Rightarrow A \bar B+ AB = A(B + \bar B) = A$

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