Demonstração das Propriedades I

1st Year of High School Prof. Sandro Vinícius We demonstrate the first property in a preliminary version; and the second step on the rigorous path to the proof. Access more video lessons and all the material from the Mathematics Portal at http://matematica.obmep.org.br The rights to all the material in this channel belong to the Institute of Pure and Applied Mathematics, and the total or partial use of the content is prohibited without prior written authorization from the aforementioned holder, except in the cases provided for in current legislation.