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The Boolean expression for a 3-input AND gate is ________.

  • A.X = AB
  • B.X = ABC
  • C.X = A + B + C
  • D.X = AB + C

Answer: B

Correct answer: X = ABC

AND is written as a product, so a three-input AND is the product of all three variables. The plus sign would make it an OR, and \( AB+C \) mixes the two operations.

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