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If you don't learn Sets, you will have serious problems in Mathematics, especially in Functions. In this video lesson, you will learn what a set is (concept and examples), how to represent a set (by key, by comprehension and by Venn diagram), equality of sets, empty set, unitary set, universal set, membership relation and inclusion relation (subsets). This content is studied in the 1st year of high school. Don't forget, this subject may be included in ENEM (National High School Exam). Study with me and be successful in Mathematics. ONLINE MATHEMATICS PLATFORM: https://thyagoaraujo.com/ Here on the channel, you will find several free Mathematics video lessons for elementary and high school. SUBSCRIBE TO THE CHANNEL HERE: https://www.youtube.com/c/EscoladeNum... Follow us on social media: ► PLATFORM (Website): https://thyagoaraujo.com/ ► Facebook: / escoladenumeros ► Instagram: / escoladenumeros ► Twitter: / escoladenumeros EMAIL FOR CONTACT: [email protected] CREATED BY MASTER PROFESSOR IN MATHEMATICS THYAGO ARAUJO FERREIRA: ESCOLA DE NÚMEROS is a YouTube channel that presents Math classes (Basic, ENEM, Entrance Exams, Olympics and Competitions) completely free of charge and with simple and objective language, so that anyone (children, young people and adults) can enjoy the content. COME BECOME A BEAST IN MATHEMATICS! A big hug, good studies and see you in the next video. #Mathematics #HighSchool #ENEM