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Chapter Summary

Relations and Functions

CBSE · Class 11 · Mathematics

Summary of Relations and Functions for CBSE Class 11 Mathematics. Key concepts, important points, and chapter overview.

136 questions56 flashcards5 concepts

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Overview

Relations and functions describe how elements of one set connect with elements of another set. A relation is any collection of ordered pairs, while a function is a special relation in which each element of the first set has exactly one image in the second set. Cartesian products, domains, ranges, an

Key Concepts

A pair of elements written

A pair of elements written in a fixed order. Two ordered pairs are equal only when their first elements are equal and their second elements are equal.

For two non

For two non-empty sets P and Q, the Cartesian product P × Q is the set of all ordered pairs (p,q) with p in P and q in Q. If either set is null, the p

A relation from a non

A relation from a non-empty set A to a non-empty set B is any subset of A × B. It is formed by describing a connection between the first and second el

The domain is the set

The domain is the set of all first elements in a relation. The codomain is the whole set B. The range is the set of all second elements actually used,

A function is a relation

A function is a relation in which every element of the first set has one and only one image in the second set. A function is written as f: A → B.

Learning Objectives

  • Understand ordered pairs and Cartesian products of sets.
  • Identify and form relations between two sets.
  • Find the domain, codomain, and range of a relation.
  • Distinguish between a relation and a function.
  • Study special real functions such as identity, constant, polynomial, rational, modulus, signum, greatest integer, and linear functions.

Frequently Asked Questions

What are the important topics in Relations and Functions for CBSE Class 11 Mathematics?
Key topics in Relations and Functions include Relations and Functions – Complete Concept Map, Relations and Functions - Full Chapter Concept Hierarchy, Relations and Functions — Complete Concept Map. These are the concepts CBSE Class 11 examiners draw on most — study them first, then practise related questions.
How to score full marks in Relations and Functions — CBSE Class 11 Mathematics?
Understand the core concepts first, then work through the 136 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Relations and Functions

All 14 chapters — CBSE Class 11 Mathematics Chapter Summary

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