4.1 - Definition
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
Define a relation.
💡 Hint: Focus on how elements from two sets interact.
What is a reflexive relation?
💡 Hint: Think of self-pairs.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What defines a reflexive relation?
💡 Hint: Reflect on self-connections in sets.
True or False: Every bijective function is also surjective.
💡 Hint: Consider the definitions of surjective and injective together.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Create a function from set A = {1, 2, 3, 4} to set B = {x, y}. Can such a function be injective? Explain why or why not.
💡 Hint: Consider uniqueness in mappings.
Consider sets A = {1, 2} and B = {a, b, c}. Define a function from A to B and evaluate its surjectiveness.
💡 Hint: Check the coverage of outputs.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.