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Functions
hard
0:00.0
Domain of
f
(
x
)
=
−
x
f(x) = \sqrt{-x}
f
(
x
)
=
−
x
?
A
x
≤
0
x \le 0
x
≤
0
B
R
\mathbb{R}
R
C
x
≥
0
x \ge 0
x
≥
0
D
x
>
0
x > 0
x
>
0
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