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dmitriy555 [2]
2 years ago
12

La base de un auditorio es de forma elíptica y tiene 22 m de longitud y 18 m de ancho. Si cae un alfiler en uno de sus focos el

ruido que produce se escucha claramente cerca del otro foco.¿ A qué distancia está un foco del otro? Dada la siguiente ecuación expresaría en su forma canónica y graficar en la hoja 2x² + 8x - y + 8 = 0
Mathematics
1 answer:
Alenkinab [10]2 years ago
6 0

Un foco está a una distancia de 4√10 metros del otro foco.

La forma canónica de la cónica es y = 2 · (x - 2)² y la gráfica se incluye en la imagen adjunta.

<h3>¿Cómo analizar elipses? </h3>

Esta pregunta contiene dos ejercicios relacionados con dos tipos de cónica denominados elipse y parábola. En la primera parte, debemos determinar la distancia entre focos, que es igual al duplo de la distancia entre el vértice y el foco, es decir:

d = 2 · √[a² - b²]      

Donde:

  • a - Longitud del semieje mayor, en metros.
  • b - Longitud del semieje menor, en metros.

Si sabemos que a = 11 m y b = 9 m, entonces la distancia entre focos:

d = 2 · √[11² - 9²]

d = 4√10 m

Un foco está a una distancia de 4√10 metros del otro foco.

En el segundo caso debemos completar el cuadrado y simplificar la ecuación cuadrática hasta obtener su forma canónica, cuyo procedimiento se presenta a continuación:

2 · x² + 8 · x - y + 8 = 0

(2 · x² + 8 · x) = y - 8

2 · (x² - 4 · x) = y - 8

2 · (x² - 4 · x + 4) = y - 8 + 8

y = 2 · (x² - 4 · x + 4)

y = 2 · (x - 2)²

La forma canónica de la cónica es y = 2 · (x - 2)² y la gráfica se incluye en la imagen adjunta.

Para aprender más sobre cónicas: brainly.com/question/28109000

#SPJ1

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