Ex 2.3, 5 (ii) - Chapter 2 Class 11 Relations and Functions
Last updated at Dec. 16, 2024 by Teachoo
Last updated at Dec. 16, 2024 by Teachoo
Ex 2.3, 5 Find the range of each of the following functions. (ii) f(x) = x2 + 2, x, is a real number. We know that Square of a number will always be positive or 0 So we can say that x2 ≥ 0 Adding 2 both sides x2 + 2 ≥ 0 + 2 x2 + 2 ≥ 2 f(x) ≥ 2 ∴ Range of f = [2, ∞) (We need to make it of form x2 + 2)
About the Author
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo