Math Problem Statement

Select the expression that evaluates to false. Given: p = F, q = T, r = T.

Solution

To solve this problem, let's evaluate each of the given logical expressions with the values provided: p=Fp = F, q=Tq = T, and r=Tr = T.

  1. Option A: qrq \lor r

    • qr=TT=Tq \lor r = T \lor T = T
    • This expression evaluates to true.
  2. Option B: qrq \land r

    • qr=TT=Tq \land r = T \land T = T
    • This expression evaluates to true.
  3. Option C: prp \lor r

    • pr=FT=Tp \lor r = F \lor T = T
    • This expression evaluates to true.
  4. Option D: ¬q\neg q

    • ¬q=¬T=F\neg q = \neg T = F
    • This expression evaluates to false.

So, the expression that evaluates to false is Option D: ¬q\neg q.

Would you like more details or have any questions?

Here are some related questions you might find interesting:

  1. What are the truth tables for basic logical operations (AND, OR, NOT)?
  2. How do you evaluate a compound logical expression?
  3. What are De Morgan's laws in logic?
  4. How do you convert a logical expression to its disjunctive normal form (DNF)?
  5. How do logical gates in digital circuits relate to these expressions?

Tip: When dealing with logical expressions, always remember the truth tables for AND (\land), OR (\lor), and NOT (¬\neg) operations, as they are fundamental in evaluating the expressions.

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Math Problem Analysis

Mathematical Concepts

Logic
Boolean Algebra

Formulas

Logical AND (∧), Logical OR (∨), Logical NOT (¬)

Theorems

Truth Table for AND, OR, and NOT operations

Suitable Grade Level

Grades 9-12