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What is the Boolean expression for a three-input AND gate?

  • A.X = A + B + C
  • B.X = A · B · C
  • C.A - B - C
  • D.A $ B $ C

Answer: B

Correct answer: X = A · B · C

AND is a product, written with dots or by juxtaposition. The plus sign denotes OR, and the other two symbols have no meaning in Boolean algebra.

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