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Mathematics
Problem
The function
f
:
R
→
R
f:\mathbb R\to\mathbb R
f
:
R
→
R
is defined by
f
(
x
)
=
x
2
f(x)=x^{2}
f
(
x
)
=
x
2
. a. (i) Why is
f
f
f
not invertible on
R
\mathbb R
R
? b. (ii) Write one suitable domain restriction that makes
f
f
f
invertible.
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