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.

the answer is 8 you can find soloution below you have to click on submit code rather than run code the run code is not working properly. error is comming .

Click "Test against custom input" and enter "{1,2,3,4,5,6}{2,3,4,5,6,7,8}". You can now click "Run Code" and test your output.

8 is the right answer

union is just count the number of common elements in both sets and that is 8. type 8 in editor box and click submit