Math Problem Statement

Construct a complete truth table for each of the following compound propositions: (a) (p → q) ↔ (¬q → ¬p) and (b) (p ⊕ q) ∧ (p ⊕ ¬q).

Solution

Let's break down the two compound propositions in the image and construct their truth tables.

(a) (pq)(¬q¬p)(p \rightarrow q) \leftrightarrow (\neg q \rightarrow \neg p)

  • pqp \rightarrow q is a conditional statement, which is true except when pp is true and qq is false.
  • ¬q¬p\neg q \rightarrow \neg p is the contrapositive of pqp \rightarrow q, which is logically equivalent to pqp \rightarrow q. So, we expect the entire statement to always be true, but we will verify this with a truth table.

(b) (pq)(p¬q)(p \oplus q) \land (p \oplus \neg q)

  • pqp \oplus q is the XOR (exclusive or) operation, which is true when exactly one of pp or qq is true.
  • p¬qp \oplus \neg q is true when exactly one of pp or ¬q\neg q is true.
  • The conjunction \land of these two expressions will be true only when both are true.

Now, I will construct the truth tables for both (a) and (b).

Let me calculate them.Here are the truth tables for the given compound propositions:

(a) (pq)(¬q¬p)(p \rightarrow q) \leftrightarrow (\neg q \rightarrow \neg p)

ppqqpqp \rightarrow q¬q¬p\neg q \rightarrow \neg p(pq)(¬q¬p)(p \rightarrow q) \leftrightarrow (\neg q \rightarrow \neg p)
TrueTrueTrueFalseFalse
TrueFalseFalseTrueFalse
FalseTrueTrueTrueTrue
FalseFalseTrueTrueTrue

(b) (pq)(p¬q)(p \oplus q) \land (p \oplus \neg q)

ppqqpqp \oplus qp¬qp \oplus \neg q(pq)(p¬q)(p \oplus q) \land (p \oplus \neg q)
TrueTrueFalseTrueFalse
TrueFalseTrueFalseFalse
FalseTrueTrueFalseFalse
FalseFalseFalseTrueFalse

Would you like more details on any part of these solutions?

5 Related Questions:

  1. How do logical equivalences work in truth tables?
  2. What is the difference between XOR (\oplus) and OR (\lor)?
  3. Why is the contrapositive always logically equivalent to the original conditional?
  4. Can you explain how conjunction (\land) affects the truth value of a compound proposition?
  5. How do we interpret truth table results in logic circuits?

Tip: Always simplify logical expressions using known equivalences to verify complex propositions.

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Math Problem Analysis

Mathematical Concepts

Logic
Propositional Logic
Truth Tables

Formulas

p → q is a conditional statement
¬q → ¬p is the contrapositive of p → q
p ⊕ q is the XOR operation
p ∧ q is conjunction

Theorems

Contrapositive equivalence
Logical equivalence
XOR properties

Suitable Grade Level

Grades 9-12 (High School Level)