Practice Part A: Symmetric Relations (21.4.1) - Lecture -20 - Discrete Mathematics - Vol 1
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Part A: Symmetric Relations

Practice - Part A: Symmetric Relations

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Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Define a symmetric relation.

💡 Hint: What must be true for pairs in symmetric relations?

Question 2 Easy

Give an example of a symmetric relation in everyday life.

💡 Hint: Think of a reciprocal relationship.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

Which of the following defines a symmetric relation?

If (a
b) is in R
then (b
a) must also be in R.
If (a
b) is in R
then (b
c) must also be in R.
If (a
b) is not in R
then (b
a) must not be in R.

💡 Hint: Think about the mutual involvement of pairs.

Question 2

True or False: A symmetric relation must contain both (a, b) and (b, a) for all elements.

True
False

💡 Hint: Consider what happens when pairs are not included.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Given a set of n elements, determine the total possible symmetric relations and explain the reasoning.

💡 Hint: Recall how symmetry pairs require mutual inclusion.

Challenge 2 Hard

Consider the set A = {1, 2, 3}. Construct all symmetric relations possible and classify them.

💡 Hint: List all pairs and check if they fulfill the symmetry condition.

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