Chapter 2 Relations and Functions - Class 11 Mathematics

Submitted by superadmin on Wed, 23/04/2025 - 14:23

NCERT Class 11 Mathematics for blind and visually impaired students.

This Chapter is planned, organized and described by Dr. T K Bansal for visually impaired and blind students. All efforts have been made to make the chapter fully accessible by providing headings, describing figures and tables. The Chapter has been so designed that the students should enjoy studying this chapter and should move forward without any hurdles. The chapter has been thoroughly checked for any mistakes, still if you find any mistakes or have any suggestions to make it better, please write to us at ‘ blind2Visionary@gmail.com ‘. Your efforts will be highly appreciated.

Table of symbols used in this chapter:

Symbol Known As Used For Description
∈ Element of Element of a set Epsilon, a Greek letter
× Times Multiplication Normal cross sign
φ fi null set Greek letter phi
≠ Not equal to Not equal to Equal to sign with a forward slash on it
∩ intersection intersection like a inverted capital U
∪ union union like a capital U
→ Rightwards Arrow Goes to A right directing arrow
√ Square root Square root Normal radical sign
≥ grater than or equal to greater than or equal to Greater than sign with a parallel line to the lower arm of Greater than sign
≤ Less than or equal to Less than or equal to A dash below the lower arm of < sign
′ Prime Making two values different Like ‘ sign
α Alpha used for symbol a Greek letter alpha
⊂ subset of a subset of like the letter c
∞ Infinity Infinity a horizontally lying number 8

Mathematics is the indispensable instrument of all physical research. - BERTHELOT