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Ex 2.3, 5 (ii) - Chapter 2 Class 11 Relations and Functions (Term 1)
Last updated at Aug. 27, 2021 by Teachoo
Chapter 2 Class 11 Relations and Functions
Serial order wise
- Ex 2.1
- Ex 2.2
-
Ex 2.3
- Examples
- Miscellaneous
Transcript
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)
