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Mathematics
Problem
Find the domain of the function
f
(
x
)
=
3
x
+
1
x
2
−
9
x
,
f(x)=\dfrac{3x+1}{x^2-9x},
f
(
x
)
=
x
2
−
9
x
3
x
+
1
,
expressing your answer in set-builder form.
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