Who invented arithmetic progression?

Answer 1

No one. It is simply a fact.

Answer 2

The concept of arithmetic progression was not invented by a single individual, as it has been developed over centuries by various mathematicians. However, the ancient Greek mathematician Pythagoras and his followers made significant contributions to the study of arithmetic progressions. They explored the properties and patterns of these sequences, laying the foundation for the modern understanding of arithmetic progressions.

Answer 3

Well it was invented by a smart boy known as Carl Friedrich Gauss. It has an indeed interesting story associated with it. You can Google it if you are interested.