If A = 1 and B = 0, then in terms of Boolean algebra, A + BÌ… =

  1. B
  2. AÌ…
  3. A
  4. None of these.

Answer (Detailed Solution Below)

Option 3 : A
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Detailed Solution

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CONCEPT:

  • The branch of algebra that deals with the values of the variables in the form of the truth values i.e., true and false are called Boolean algebra.
  • True and false are usually denoted by 1 and 0 respectively.

EXPLANATION:

Given that:

A = 1

B = 0

∴ BÌ… = 1 (Since BÌ… is reverse of B)

A + BÌ… = 1 + 1 = 1 (Since A + A = A)

A + BÌ… = 1 = A

Boolean Laws

Law

Dual Pair

Remark

A + B = B + A

A.B = B.A

Commutative Law

A + (B + C) = (A + B) + C

A (BC) = (AB) C

Associative Law

A (B + C) = AB + AC

A + (BC) = (A + B) (A + C)

Distributive Law

A + 1 = 1

A.1 = A

Identity Law/Redundancy Law

A + 0 = A

A.0 = 0

A + A = A

A.A = A

A + AÌ… = 1

A.AÌ… = 0

A + AB = A

A (A + B) = A

Absorption Law

\(\overline{\overline A} = A\)

-

Involution Law

A + AÌ…B = A + B

A(AÌ… + B) = A

-

BÌ… + BÌ… = B

-

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