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u Para obtener el valor mínimo, valor máximo, intersección con y y punto de
inflexión de una función
Ejemplo: Representar gráficamente la función y = x
2
(x + 2)(x – 2) y obtener su valor
mínimo.
(1) Abra el cuadro de diálogo de la ventana de visualización, y configúrelo con los
parámetros siguientes.
xmin = –7.7, xmax = 7.7, xscale = 1
ymin = –3.8, ymax = 3.8, yscale = 1
(2) En la ventana del editor de gráficos, introduzca y guarde y = x
2
(x + 2)(x – 2) en la
línea y1, y luego toque $ para representarla gráficamente.
•Asegúrese de que únicamente y1 está marcado.
(3) Toque [Analysis], [G-Solve] y luego [Min] o toque I.
•Aparece “Min” en la ventana de gráficos, y un puntero se sitúa en la primera solución
de valor mínimo (valor mínimo de y para el valor más pequeño de x). Las
coordenadas x e y en la posición actual del puntero también se muestran en la
ventana de gráficos.
(4) Para obtener otros valores mínimos, presione la tecla de cursor izquierda o derecha, o
toque las flechas izquierda o derecha del controlador de gráfico.
•Si existe una única solución, el puntero no se mueve cuando presiona la tecla de
cursor.
Capturas de pantalla de resultados
3-8-3
Analizando una función usada para dibujar un gráfico
1
2
1
2
Consejo
Para obtener los otros valores, seleccione el comando que corresponda del menú [G-Solve] en
el paso (3) del procedimiento anterior.
Valor máximo
Intersección con
y
Punto de inflexión
Max (o toque U)
y-Intercept
Inflection
Seleccione este comando del menú [G-Solve]:
Para obtener este valor:
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