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Mathematics
Mathematics
Problem
Let
f
(
x
)
=
1
x
−
2
f(x)=\dfrac{1}{x-2}
f
(
x
)
=
x
−
2
1
,
x
≠
2
x\ne2
x
=
2
, and
g
(
x
)
=
x
g(x)=\sqrt{x}
g
(
x
)
=
x
. The domain of
(
g
∘
f
)
(
x
)
(g\circ f)(x)
(
g
∘
f
)
(
x
)
is a)
[
2
,
∞
)
[2,\infty)
[
2
,
∞
)
b)
R
∖
{
2
}
\mathbb{R}\setminus\{2\}
R
∖
{
2
}
c)
(
2
,
∞
)
(2,\infty)
(
2
,
∞
)
d)
(
−
∞
,
2
)
(-\infty,2)
(
−
∞
,
2
)
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