UPSKILL MATH PLUS

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Sets
A set is a collection of well-defined, distinguishable objects.
The set is denoted by a capital letter, whereas the elements of a set are represented by small letters written inside the curly braces $$\{ \}$$.
Example:
$$A$$ is the set of all even numbers less than $$10$$.
$$A =$$ $$\{2, 4, 6, 8\}$$

We will extend the concept of sets in the following two forms.
• Functions
• Relations
Almost every day-to-day situation can be mathematically represented either through a function or a relation.
Some real-life examples of functions and relations
• The height of a person at a particular age can be expressed as a function.

• The area and volume of geometrical figures can be expressed as a function with one or more variables.

• The temperature in a particular season represents a relationship.

To go from sets to functions and relationships, we need to know the cartesian product of two non-empty sets. We will talk about this in the exercises that follow.

Important!
Refer below to recall set operations.
Reference:
https://pixabay.com/photos/seasons-4-seasons-four-seasons-5880235/