The simplified SOP (Sum of Product) from the Boolean expression \((P + \bar{Q}…
2011
The simplified SOP (Sum of Product) from the Boolean expression
\((P + \bar{Q} + \bar{R}) . (P + \bar{Q} + R) . (P + Q +\bar{R})\) is
- A.
\((\bar{P}.Q+\bar{R})\) - B.
\((P+\bar{Q}.\bar{R})\) - C.
\((\bar{P}.Q+R)\) - D.
\((P.Q+R)\)
Attempted by 66 students.
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Correct answer: B
Simplified result: P + ¬Q·¬R
Step 1: Use (X+Y)(X+Z) = X + YZ with X = (P+¬Q), Y = ¬R, Z = R to simplify (P+¬Q+¬R)(P+¬Q+R) to (P+¬Q).
Step 2: Apply (X+Y)(X+Z) = X + YZ again with X = P, Y = ¬Q, Z = (Q+¬R):
This gives P + ¬Q·(Q + ¬R) = P + (¬Q·Q) + (¬Q·¬R) = P + 0 + ¬Q·¬R = P + ¬Q·¬R.
Therefore the simplified SOP form is P + ¬Q·¬R.
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