Notación y Representación de Intervalos: Guía Visual y Simbología

Section role: supports the 'La Notación y Representación de Intervalos' section while the teacher explains the differences between open, closed, and semi-open intervals, contrasting them with inequalities and number line graphs. Slides: (1) Title — 'Tipos de Intervalos: Abiertos, Cerrados y Semiabiertos'; (2) Intervalo Abierto — bullets: definition using inequality '<', notation (a, b), visual example with empty circle on the number line; (3) Intervalo Cerrado — bullets: definition using '≤', notation [a, b], visual example with filled dot; (4) Intervalo Semiabierto — bullets: combinations like [a, b) and (a, b], mixing open and closed ends; (5) Ejercicio Trabajado — bullets: step-by-step representation of the interval [-2, 3), showing why -2 is included and 3 is not; (6) El caso del infinito — bullets: rule that infinity symbol (∞) always uses a parenthesis, translating 'x > 5' to (5, ∞); (7) Resumen de Símbolos — comparison table linking inequalities, interval notation, and graphical representations. Closing slide: '¿Cómo escribirían en notación de intervalo el conjunto de todos los números menores o iguales a 4?' — sets up the translation and practice section that follows.

Lara de Teachy