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Mathematics
Problem
Find the domain of the rational function
f
(
x
)
=
3
x
−
1
x
2
−
9
f(x) = \frac{3x - 1}{x^2 - 9}
f
(
x
)
=
x
2
−
9
3
x
−
1
. Express your answer in interval notation.
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