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Mathematics
Mathematics
Problem
For the function
f
:
R
→
R
f: \mathbb R \to \mathbb R
f
:
R
→
R
defined by
f
(
x
)
=
x
2
f(x)=x^{2}
f
(
x
)
=
x
2
, explain why
f
f
f
is not onto.
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