II. LEARNING AND USING THE MATHEMATICAL CONCEPT OF A FUNCTION.

The article reports on the concept of functions in the study and learning of mathematics. Functions are mathematical entities, designated by many other names that are associated to the different branches of mathematics. One of the characteristics of functions is that it acts upon and combines with certain objects and converting them into unique objects of the same kind. It was through the study of geometry that the functions were first detected. Examples of functions were also accumulated gradually and was not numerous until the start of the previous century.