Exercise 3.4 (Q5–Q7) | Binary Relation of Sets |Inverse Relation & Arrow Diagram| Class 9 Maths

Welcome to Frontier Maths Channel! 🎓📚 In this detailed and easy-to-understand lecture, we will solve NBF Class 9th Mathematics Exercise 3.4 (Questions 5–7) step by step. This lecture focuses on the concept of Binary Relations of Sets, including Domain of a Relation, Range of a Relation, finding all possible binary relations, and calculating the number of binary relations using the formula . Every question is explained with clear concepts, proper mathematical notation, and easy methods to help students prepare confidently for their board examinations. 📖 What You Will Learn ✅ Exercise 3.4 – Questions 5 to 7 ✅ What is a Binary Relation of Sets? ✅ How to represent a Binary Relation ✅ How to find the Domain of a Relation ✅ How to find the Range of a Relation ✅ Finding all possible Binary Relations ✅ Number of Binary Relations using the formula ✅ Step-by-step solutions of all questions ✅ Concept-based explanations ✅ Board exam preparation tips 📌 Important Topics Covered 🔹 Binary Relation between two sets 🔹 Cartesian Product 🔹 Domain of a Relation 🔹 Range of a Relation 🔹 Ordered pairs in relations 🔹 Finding all possible relations 🔹 Exam-focused problem-solving techniques 💡 Special Focus of This Lecture You will learn how to: Define a Binary Relation between two sets. Find the Domain and Range of a given relation. List all possible binary relations for small sets. Calculate the total number of binary relations using the formula: 2^n(A×B) with complete step-by-step explanations. 🌟 About Frontier Maths Frontier Maths provides easy, clear, and exam-focused Mathematics lectures for Class 9th, 10th, 11th, 12th, and Higher Mathematics students. Our lectures include: 📌 NBF Mathematics textbook solutions 📌 Chapter-wise and exercise-wise lectures 📌 Step-by-step explanations 📌 Conceptual questions 📌 Important formulas 📌 Board exam preparation 📌 Easy methods for difficult questions 📚 This lecture is part of our NBF Class 9th Mathematics Chapter 3 complete lecture series. 🔔 Subscribe to Frontier Maths and turn on notifications for more Mathematics lectures, exercise solutions, and board exam preparation. #FrontierMaths #Class9Maths #NBF #Exercise3.4 #BinaryRelation #Domain #Range #Sets #CartesianProduct #SetTheory #Class9Mathematics #9thMaths #MathsSolution #FBISE #PunjabBoard #SindhBoard #KPKBoard #GBBoard #BoardExam2026 #Mathematics #Relations