Question

what is the range of a function

Answer 1

Answer:

In mathematics, the range of a function may refer to either of two closely related concepts: The codomain of the function The image of the function.

Answer 2

As the term "range" can have different meanings, it is considered a good practice to define it the first time it is used in a textbook or article. Older books, when they use the word "range", tend to use it to mean what is now called the codomain. More modern books, if they use the word "range" at all, generally use it to mean what is now called the image. To avoid any confusion, a number of modern books don't use the word "range" at all.