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Boolean Algebra

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Multiple Choice

What is the dual of the expression (A ∨ B) ∧ (C ∧ D)?

  1. ¬(¬A ∧ ¬B) ∨ ¬(¬C ∨ ¬D)
  2. ¬(¬A ∨ ¬B) ∧ ¬(¬C ∧ ¬D)
  3. ¬(A ∧ B) ∨ ¬(C ∨ D)
  4. ¬(A ∨ B) ∧ ¬(C ∧ D)
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