Romero Lee
12/29/2023 · Senior High School

SACAR DOMINIO \( \frac{(3 x+3)(x-8)}{x^{2}-1} \)

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Para sacar el dominio de la función \( \frac{(3x+3)(x-8)}{x^{2}-1} \), debemos identificar los valores de \( x \) que hacen que el denominador sea igual a cero, ya que esos valores no están permitidos en el dominio. Primero, resolvemos la ecuación del denominador: \[ x^{2} - 1 = 0 \] Factoreamos la expresión: \[ (x - 1)(x + 1) = 0 \] Esto nos da dos soluciones: \[ x - 1 = 0 \quad \Rightarrow \quad x = 1 \] \[ x + 1 = 0 \quad \Rightarrow \quad x = -1 \] Por lo tanto, los valores que hacen que el denominador sea cero son \( x = 1 \) y \( x = -1 \). Estos valores deben ser excluidos del dominio. El dominio de la función se puede expresar en notación de intervalos como: \[ (-\infty, -1) \cup (-1, 1) \cup (1, \infty) \] En resumen, el dominio de la función \( \frac{(3x+3)(x-8)}{x^{2}-1} \) es: \[ D = \{ x \in \mathbb{R} \, | \, x \neq -1 \, \text{y} \, x \neq 1 \} \]

Quick Answer

El dominio de la función es \( x \neq -1 \) y \( x \neq 1 \).
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