Question

The domain and range are same for
(A) constant function
(B) absolute function
(C) identity function
(D) greatest integer function​

Answer 1

Answer:

The domain and range are same for identity function.

Step-by-step explanation:

The identity function $f$ defined on real line is given by,

$f(x)=x$

That is identity function maps the element to itself. Since range is the collection of all images of each real number, range is also whole real numbers.

In rest of the options, the range of constant function is a singleton set. No negative number will be there in the range of  absolute function. The range of greatest integer function has only integers.