1.8 Special Cases of Functions

. Special Cases of Functions There are some special cases of a function which will be very useful. We discuss some of them below (i) Constant function (ii) Identity function (iii) Real – valued function O O O O O O (i) (iv) (ii) (v) (iii) (vi) Relations and Functions (i) Constant function A function f : ® is called a constant function if the range of f contains only one element. That is, f x