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Mathematics
Mathematics
Problem
Consider the function
f
:
R
→
R
f:\mathbb R \to \mathbb R
f
:
R
→
R
defined by
f
(
x
)
=
k
x
+
5
f(x)=kx+5
f
(
x
)
=
k
x
+
5
, where
k
k
k
is a real constant. For
f
f
f
to possess an inverse function on
R
\mathbb R
R
,
k
k
k
must be a)
k
>
0
k>0
k
>
0
b) any non-zero real number c) any real number d)
k
=
1
k=1
k
=
1
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