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Mathematics
Problem
The function
f
(
x
)
=
x
2
+
5
x
+
k
f(x) = \sqrt{x^2 + 5x + k}
f
(
x
)
=
x
2
+
5
x
+
k
has natural domain
x
∈
R
x \in \mathbb{R}
x
∈
R
. Find the possible values of
k
k
k
. Find the range of
f
(
x
)
f(x)
f
(
x
)
in terms of
k
k
k
.
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