Last updated at Jan. 28, 2020 by Teachoo

Transcript

Ex 2.3, 3 A function f is defined by f(x) = 2x – 5. Write down the values of (i) f(0) (ii) f(7), (iii) f(–3), Given f(x) = 2x – 5 Putting value of x in f(x) f(0) = 2 × 0 – 5 = 0 – 5 = –5 f(7) = 2 × 7 – 5 = 14 – 5 = 9 f(−3) = 2 × (−3) – 5 = −6 – 5 = −11

Finding values at certain points

Chapter 2 Class 11 Relations and Functions

Concept wise

- Finding Cartesian Product
- Equality of 2 ordered pairs
- Number of elements
- Operations on sets+ cartesian product
- Relations - Definition
- Finding Relation - Set-builder form given
- Finding Relation - Arrow Depiction given
- Number of Relations
- Functions - Definition
- Finding values at certain points
- Different Functions and their graphs
- Finding Domain and Range - By drawing graphs
- Finding Domain and Range - General Method
- Algebra of real functions

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.