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Matemática 2

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En este documento encontraremos información sobre las funciones, incluyendo gráficos, dominios y rangos de esas funciones, ejemplos y fórmulas.

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Funciones
Es una regla de correspondencia entre dos conjuntos de Las funciones también se
tal manera que a cada elemento del primer conjunto le pueden presentar en
corresponde uno del segundo conjunto. fórmulas.
Son dos conjuntos al cual le toca un dato del otro lado
(uno sólo)

Elementos básicos
- Dominio; es el conjunto de partida.




- Codominio; es el conjunto de llegada
- Pre imágenes; son los elementos del dominio
- Imágenes; todos los elementos del conjunto de llegada que tengan
relación con una pre imagen.
- Rango, recorrido o ámbito; subconjunto del codominio formado por las
imágenes

Notación de funciones ( es la expresión analítica de la función)
- Forma implícita= 𝑥 2 + 2𝑦 = 1
1−𝑥 2
- Forma explícita= es la forma implícita pero despejada= 𝑦 = 2
1−𝑥 2
- Forma funcional= 𝑓(𝑥) = 2
=Esto es así porque y depende de x

Función real de variable real Cuando hay una función
Sean “x” y “y” conjuntos de números reales, una función radical y este no tiene
real f de una variable real “x” de X a “y” es una signo antes que este se
correspondencia que asigna a cada número “x” de X presume que es una función
exactamente un número “y” de Y. positiva

Evaluación de función
Para la función f definida por 𝑓(𝑥) = 𝑥 2 + 7, calcular
a) 𝑓(3𝑎)
b) 𝑓(𝑏 − 1)
𝑓(𝑥+∆𝑥)−𝑓(𝑥)
c) ∆𝑥

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Uploaded on
November 24, 2022
Number of pages
4
Written in
2022/2023
Type
Class notes
Professor(s)
Yonder araujo
Contains
Only second lesson

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