Respuesta :

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[tex]f(x)=\frac{1}{x^2-9}[/tex]

The denominator can't be equal to 0.
[tex]x^2-9 \not= 0 \\ x^2 \not= 9 \\ x \not= -3 \ \land \ x \not= 3[/tex]

The domain is all numbers except -3 and 3.
[tex]x \in \mathbb{R} - \{-3, 3 \}[/tex]

Answer:

the domain represents the number of hours Albert has walked in the walkathon

Step-by-step explanation:

PLATO,EDMENTUM

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