Math Problem Statement

(p→q)∨(q→r) make a truth table

Solution

To create a truth table for the expression (pq)(qr)(p \rightarrow q) \vee (q \rightarrow r), we need to consider the truth values for all possible combinations of the variables pp, qq, and rr.

Step-by-Step Breakdown:

  1. Implication (\rightarrow): The statement ABA \rightarrow B (if AA, then BB) is false only when AA is true and BB is false. In all other cases, it is true.
  2. Disjunction (\vee): The statement ABA \vee B (A or B) is true if at least one of AA or BB is true.

Let's break down the components of (pq)(qr)(p \rightarrow q) \vee (q \rightarrow r) into a truth table:

ppqqrrpqp \rightarrow qqrq \rightarrow r(pq)(qr)(p \rightarrow q) \vee (q \rightarrow r)
TTTTTT
TTFTFT
TFTFTT
TFFFTT
FTTTTT
FTFTFT
FFTTTT
FFFTTT

Explanation:

  1. Columns for pp, qq, and rr: These list all possible truth values (True, False) for pp, qq, and rr.
  2. Column pqp \rightarrow q: True except when pp is True and qq is False.
  3. Column qrq \rightarrow r: True except when qq is True and rr is False.
  4. Final Column (pq)(qr)(p \rightarrow q) \vee (q \rightarrow r): True when at least one of pqp \rightarrow q or qrq \rightarrow r is true.

Thus, the compound statement (pq)(qr)(p \rightarrow q) \vee (q \rightarrow r) is always true for all possible values of pp, qq, and rr.

Would you like more details on any of these steps, or have other questions?

Related Questions:

  1. What are the truth tables for pqp \rightarrow q and qrq \rightarrow r individually?
  2. How do truth tables relate to logical equivalences?
  3. Can you simplify the expression (pq)(qr)(p \rightarrow q) \vee (q \rightarrow r)?
  4. What is the significance of tautologies in logical statements?
  5. How do you represent the logical disjunction (\vee) in different programming languages?

Tip: Understanding the properties of logical connectives like implication and disjunction can help in reducing complex logical statements to simpler forms.

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Math Problem Analysis

Mathematical Concepts

Logic
Truth Tables
Implication (→)
Disjunction (∨)

Formulas

Implication (A → B): True except when A is true and B is false
Disjunction (A ∨ B): True if at least one of A or B is true

Theorems

Implication Theorem
Disjunction Theorem

Suitable Grade Level

Grades 9-12