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=Functions=

Definition:
A Function is a operational rule where a group of objects in a set A, have assigned a one object and only one object in a set B. In math, the group of number's belong to the Real Numbers (lR) (In mathematics, the group of objects are Real numbers). Therefore, when we talk about functions, we are assigning one number of set A to only and only one number of set B.

Description:
The Functions are c (h) aracterized to represent, in algebraic language, set's of numbers A and B. The functions uses the variables to indentify and modify mathematic relations between the sets A and B, using some of algebra.

For example, we can express the relation between the set A and set B using the next function:

y = x^2 + 3

Where "x" represent the set A, and "y" the set B. They are called "Variables". On the other hand, "x" is called too, "Independ Variable" and "y" depended variable.

Other notation used to represent a function is the notation "f of x", that we can express it across the next structure:

f(x) = x^2 + 3

Where "f(x)" has the same use like "y", with the diference that it can be tell us, what value was assigned to the variable x.

For Example:

f(3) = (3)^2 + 3 = 12