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Mathematics
Problem
For the function
f
(
x
)
=
x
2
−
9
x
−
3
f(x)=\dfrac{x^{2}-9}{x-3}
f
(
x
)
=
x
−
3
x
2
−
9
, which statement about its domain is correct? a)
R
\mathbb R
R
b)
R
∖
{
−
3
}
\mathbb R\setminus\{-3\}
R
∖
{
−
3
}
c)
R
∖
{
3
}
\mathbb R\setminus\{3\}
R
∖
{
3
}
d)
R
∖
{
3
,
−
3
}
\mathbb R\setminus\{3,-3\}
R
∖
{
3
,
−
3
}
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