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Mathematics
Mathematics
Problem
Let
f
:
R
→
(
0
,
∞
)
f:\mathbb{R}\to(0,\infty)
f
:
R
→
(
0
,
∞
)
be given by
f
(
x
)
=
e
k
x
f(x)=e^{kx}
f
(
x
)
=
e
k
x
, where
k
k
k
is a real parameter. For which value(s) of
k
k
k
is
f
f
f
bijective? a)
k
>
0
k>0
k
>
0
b)
k
=
0
k=0
k
=
0
c)
k
≠
0
k\ne 0
k
=
0
d)
k
<
0
k<0
k
<
0
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