NCERT class 11 maths chapter 2 Relations and Functions
Question 1:Which of the following relations are functions? Give reasons. If it is a function, determine its domain and range. (i) {(2,1), (5,1), (8,1), (11,1), (14,1), (17,1)} (ii) {(2,1), (4,2), (6,3), (8,4), (10,5), (12,6), (14,7)} (iii) {(1,3), (1,5), (2,5)}.
Exercise 2.3 maths class 11 Chapter 2 Relations and Functions
Question 2:Find the domain and range of the following real functions: (i) f(x) = – x (ii) f(x) = 9 − x2 .
CBSE class 11 maths ncert solutions Chapter 2
Question 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).
class 11 maths solutions Relations and Functions
Question 4:The function ‘t’ which maps temperature in degree Celsius into temperature in degree Fahrenheit is defined by t(C) = 9C 5 + 32. Find (i) t(0) (ii) t(28) (iii) t(–10) (iv) The value of C, when t(C) = 212.
Question 5:Find the range of each of the following functions. (i) f (x) = 2 – 3x, x Î R, x > 0. (ii) f (x) = x2 + 2, x is a real number. (iii) f (x) = x, x is a real number.
