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Mathematics
Mathematics
Problem
For which real values of
k
k
k
is the function
f
:
R
→
R
f:\mathbb R\to\mathbb R
f
:
R
→
R
given by
f
(
x
)
=
k
x
+
2
f(x)=kx+2
f
(
x
)
=
k
x
+
2
injective? a)
k
>
0
k>0
k
>
0
b) All real
k
k
k
c)
k
≠
0
k\neq 0
k
=
0
d)
k
≥
1
k\ge 1
k
≥
1
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