Question

What is proof?
where/when/how was it created?
How is it used?
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Answer 1

Answer: I did a lot of research for this :)

Explanation:

Proof is reasoning that an equation or expression works. It is used in Geometry and Calculus. It is likely first created as an ancient greek mathematics reasoning. Thales was one of the first text books featuring geometry proof(624–546 BCE). It is used to prove that the equation matches.