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Functions
hard
0:00.0
What is the range of
f
(
x
)
=
1
1
+
x
2
f(x) = \frac{1}{1+x^2}
f
(
x
)
=
1
+
x
2
1
?
A
(0, 1]
B
[0, 1]
C
(0, 1)
D
(-1, 1)
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