‹ Back to the paper
The dual of is:
The dual of $(P + P') \cdot (Q + 0) = Q$ is:
- (a)$P \cdot P' + Q \cdot 1 = Q$
- (b)$P \cdot P' + Q \cdot 0 = Q$
- (c)$P \cdot P + Q \cdot 1 = Q'$
- (d)$P + P' + Q + 1 = Q$
Answer
Answer
AICorrect option: (a)
Answer: (a) $P \cdot P' + Q \cdot 1 = Q$
The dual of an expression is formed by interchanging every $+$ with $\cdot$ and every $0$ with $1$ (variables are left unchanged): $(P+P')\cdot(Q+0)=Q$ becomes $(P\cdot P')+(Q\cdot 1)=Q$.
From ISC 2023 Specimen Computer Science Paper 1, question 1(ii).