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Mathematics
Problem
Determine all real values of
k
k
k
for which the function
f
:
R
→
R
f:\mathbb{R}\rightarrow\mathbb{R}
f
:
R
→
R
defined by
f
(
x
)
=
x
3
+
3
k
x
f(x)=x^{3}+3kx
f
(
x
)
=
x
3
+
3
k
x
is one–one.
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