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4.1: Notación de funciones

Última actualización

30 oct 2022
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- 4: Funciones
- 4.2: Dominio y rango de una función

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La notación para una función es generalmente la $f(x)$ notación. Al aprender sobre la gráfica en álgebra normalmente usamos la $y$ notación $x$ y, es decir: $y=6 x-1$ En la notación de funciones, la variable dependiente $y$ es reemplazada por la notación $f(x):$
\ [
f (x) =6 x-1
\] Valores de
función para valores particulares de la variable independiente se $x$ pueden encontrar
sustituyendo el $x$ valor apropiado en la fórmula.
\ [
\ begin {array} {c}
f (9) =6 (9) -1=53\\
f (9) =53
\ end {array}
\]

Encuentre cada uno de los siguientes valores para las funciones dadas:
$f(0) \quad f(-1) \quad f(3) \quad f\left(\frac{1}{2}\right) \quad f(x+2) \quad f(x+h)$
1) $\quad f(x)=2 x^{2}-3 x+1$
2) $\quad f(x)=5 x^{2}+x-7$
3) $\quad f(x)=\frac{x}{x^{2}-1}$
4) $\quad f(x)=\frac{x+3}{x^{2}+1}$

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