State and prove following laws of Boolean algebra.(a) Consensus Law(b) Absorption Law
Question
State and prove following laws of Boolean algebra.(a) Consensus Law(b) Absorption Law
Solution
(a) Consensus Law:
The Consensus Law in Boolean algebra states that for three variables A, B, and C:
A + BC = (A + B)(A + C)
Proof:
We can prove this law by using the basic laws of Boolean algebra.
Step 1: Start with the right-hand side of the equation:
(A + B)(A + C)
Step 2: Apply the Distributive Law:
= AA + AC + BA + BC
Step 3: Apply the Idempotent Law (AA = A) and the Commutative Law (BA = AB):
= A + AC + AB + BC
Step 4: Apply the Distributive Law again:
= A(1 + C + B) + BC
Step 5: Apply the Null Law (A + A' = 1) and the Identity Law (A1 = A):
= A + BC
This proves the Consensus Law.
(b) Absorption Law:
The Absorption Law in Boolean algebra states that for two variables A and B:
A + AB = A A(A + B) = A
Proof:
We can prove this law by using the basic laws of Boolean algebra.
For the first equation:
Step 1: Start with the left-hand side of the equation:
A + AB
Step 2: Apply the Distributive Law:
= A(1 + B)
Step 3: Apply the Null Law (A + A' = 1):
= A
This proves the first equation of the Absorption Law.
For the second equation:
Step 1: Start with the left-hand side of the equation:
A(A + B)
Step 2: Apply the Distributive Law:
= AA + AB
Step 3: Apply the Idempotent Law (AA = A):
= A + AB
Step 4: Apply the Absorption Law (from the first equation):
= A
This proves the second equation of the Absorption Law.
Similar Questions
State and prove following laws of Boolean algebra.(a) De-Morgan’s Law(b) Distributive Law
a) Using Boolean algebra, show that the following two expressions are equivalent:F 1= A'BC + AB'C + ABC' + ABCF2 = (A+ B+C). (A+B+C'). (A+ B'+C) (A'+ B+C)These two expressions represent the majority function in sum-of-products and product-of-sums form.
tricks to remember all boolean algebra laws class 12 cs
of this following question (using boolean algebra simplify following (A) \overline{(A}+B)(A+C) (B) A (overline B) + A (overline B) * C +A (overline B) CD+A( overline B) CDE (C) BC+\overline{BCD}+B (D) (B + (overlineB))(BC + BC(overlineD)) (E) BC+\overline{(B}+\overline{C})D+BC ) the provided answer is correct if not olz provide correct answer ((A) ( � + � ) ‾ ( � + � ) (A+B) (A+C) Applying De Morgan's theorem and the distributive law: = ( � ‾ ⋅ � ‾ ) ( � + � ) = � ‾ � + � ‾ � ⋅ � ‾ =( A ⋅ B )(A+C)= A A+ A C⋅ B = 0 + � ‾ � ⋅ � ‾ = � ‾ � ⋅ � ‾ =0+ A C⋅ B = A C⋅ B (B) � � ‾ + � � ‾ � + � � ‾ � � + � � ‾ � � � A B +A B C+A B CD+A B CDE Notice that � � ‾ A B is common in all terms, so we factor it out: = � � ‾ ( 1 + � + � � + � � � ) =A B (1+C+CD+CDE) Since 1 + 1+ anything = 1 =1: = � � ‾ =A B (C) � � + � � � ‾ + � BC+ BCD +B Using the law of idempotence and considering � � � ‾ BCD does not simplify directly with � � BC or � B without further context, the expression is already in its simplified form if there are no additional constraints or identities to apply: = � � + � � � ‾ + � =BC+ BCD +B One might argue to simplify further based on specific use cases, but with the given information, this is the simplified form. (D) ( � + � ‾ ) ( � � + � � � ‾ ) (B+ B )(BC+BC D ) Using the law of complementarity ( � + � ‾ = 1 B+ B =1) and idempotence ( � � + � � = � � BC+BC=BC): = 1 ( � � + � � � ‾ ) = � � + � � � ‾ = � � ( 1 + � ‾ ) = � � =1(BC+BC D )=BC+BC D =BC(1+ D )=BC (E) � � + ( � + � ‾ ) ‾ � + � � BC+ (B+ C ) D+BC Applying De Morgan's theorem to ( � + � ‾ ) ‾ (B+ C ) : = � � + ( � ‾ ⋅ � ) � + � � =BC+( B ⋅C)D+BC Using idempotence law ( � � + � � = � � BC+BC=BC): = � � + � ‾ � � =BC+ B CD Since � ‾ � � B CD does not directly combine with � � BC, this is the simplified form given the information: = � � + � ‾ � � =BC+ B CD)
state associative law. prove or disprove algebraically if associative law holds for NOR operation or not.
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