Explanation
Solution
To find the complement of an expression, we apply a bar over the entire expression and simplify using Boolean laws.
1. Set up the expression:
The given expression is A+B. Its complement is:
2. Apply the Double Involution Law:
The Double Involution Law states that the complement of a complement of a variable (or expression) is the variable itself:
3. Simplify the expression:
Applying this law to our problem:
Note on De Morgan's Law (for comparison):
While not strictly needed to solve this specific "double bar" problem, De Morgan's laws are often used in these topics:
Final Answer:
The correct option is (c) A+B.