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Mathematics
Problem
Let
f
(
x
)
=
x
+
2
x
2
−
9
f(x)=\dfrac{x+2}{x^{2}-9}
f
(
x
)
=
x
2
−
9
x
+
2
. Determine the domain of
f
′
(
x
)
f'(x)
f
′
(
x
)
and express your answer in interval notation.
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