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➡️ Learn real Calculus, starting from scratch (pre-calculus!) to the advanced level and become unrecognizable! Click here and join Mastering Calculus: https://www.temciencia.com.br What is a real number? In this video, we will answer this question by building the system of real numbers, starting with natural numbers, going through rational numbers, the problem of incommensurables, until arriving at the definition of a real number through sequences of nested intervals, which are based on a postulate of geometry. And so we will see why, after all, real numbers are not in fact real. ????*Become a member*: https://www.youtube.com/temciencia/join ????*Amazon Store* https://www.amazon.com.br/shop/temcie... ✉️ Contact and Partners: [email protected] Script, presentation and editing: Daniel Nunes My Instagram: / tem.ciencia