Find the boolean expression for the logic circuit shown below : (1-NAND gate, 2-NOR gate, 3-NOR gate)
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Correct answer: C. AB
Explanation
Gate 1 = ¬(AB). Gate 2 = NOR(Ā, B) = A·B̄. Y = NOR(¬(AB), AB̄) = AB · ¬(AB̄) = AB(Ā + B) = AB.
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