Um texto sobre o corpo dos números complexos abordando-os de uma forma integrada e direcionada para professores de educação básica que atuam no ensino médio. Apresenta de forma bem fundamentada vários aspectos dos números complexos: par ordenado, vetor do plano, forma algébrica, forma trigonométrica e matricial. Todos os resultados essenciais foram demonstrados. Há um capítulo com alguns problemas resolvidos. / A text on the field of complex numbers in an integrated way and directed to teachers of basic education who work in high school. It presents in a well-founded form several aspects of the complex numbers: ordered pair, plane vector, algebraic form, trigonometric and matrix form. For every essential result, there is a proof. There is a chapter with some solved problems.

The diploma thesis presents a collection of solved problems in binary relations. Students are familiarized with various applications of binary relations on high school mathematics and geometry. The work focuses on graphical representation of binary relations and their use in solving equations, inequalities and their sys- tems. It is a teaching text designated for a mathematics seminar at high school. In addition to exercises, it also includes an introduction of new concepts which are supplemented by relevant definitions and illustrative examples. 1

Um texto sobre o corpo dos números complexos abordando-os de uma forma integrada e direcionada para professores de educação básica que atuam no ensino médio. Apresenta de forma bem fundamentada vários aspectos dos números complexos: par ordenado, vetor do plano, forma algébrica, forma trigonométrica e matricial. Todos os resultados essenciais foram demonstrados. Há um capítulo com alguns problemas resolvidos. / A text on the field of complex numbers in an integrated way and directed to teachers of basic education who work in high school. It presents in a well-founded form several aspects of the complex numbers: ordered pair, plane vector, algebraic form, trigonometric and matrix form. For every essential result, there is a proof. There is a chapter with some solved problems.