Desigualdades – Aula 2 – Aplicação da desigualdade básica e o raciocínio inverso

Professor: Fabio Henrique Teixeira de Souza Inequalities – Lesson 2 – Application of the basic inequality and reverse reasoning The following problem is solved: Problem 3: (a + b)(1/a + 1/b) is greater than or equal to 4, for any positive a, b. To do this, we emphasize the use of the basic inequality and also the idea of ​​proving an inequality by reasoning backwards.