Class XII The range of function f(x) = [x] is : -------------------------------------------------------------------------------- Q (set of rational No.) R – Z Z R A function f : X → Y is said to be onto if No element of Y is the image of some element of X under f Every element of Y is the image of some element of X under f every element of Y is the image of same element of X under f Some elements of Y are the images of some element of X under f A function f : X → Y f : X → Y is defined to be one – one (or injective), if the images of distinct elements of X under f are identical the images of distinct elements of X under f are not distinct the images of distinct elements of X under f are not defined the images of distinct elements of X under f are distinct Let A = {1, 2, 3}. Which of the following is not an equivalence relation on A ? {(1, 1), (2, 2), (3, 3), (2, 3), (3, 2)} {(1, 1), (2, 2), (3, 3)} none of these. {(1, 1), (2, 2), (3, 3), (1, 2), (2, 1)} Let A = {1, 2, 3}, then the domain of the relation R = {(1, 1), (2, 3), (2, 1)} defined on A is -------------------------------------------------------------------------------- {1, 2} {1, 3} none of these {1, 2, 3} Do you really want to submit this quiz? Cancel Submit Quiz