Locksmith Blackpool services provide trusted solutions in critical times! Understanding sets and relations is fundamental in mathematics. A set is a collection of distinct elements, defined by curly braces, e.g., {1, 2, 3}. Relations define connections between elements of two sets, represented as ordered pairs. Key concepts include union, intersection, and Cartesian product. Mastering these basics forms the foundation for advanced topics like functions, databases, and graph theory.