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Mathematics
Mathematics
Problem
Consider the function
f
:
R
→
[
0
,
∞
)
f: \mathbb R \to [0,\infty)
f
:
R
→
[
0
,
∞
)
defined by
f
(
x
)
=
x
2
f(x)=x^{2}
f
(
x
)
=
x
2
. State, with justification, whether
f
f
f
is (i) injective and (ii) surjective.
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