The function has natural domain

MATHEMATICS · Subjective · AP · AP Precalculus · Polynomial and Rational Functions · Polynomial and Rational Functions

Problem

The function

f(x) = \sqrt{x^2 + 5x + k}

has natural domain

x \in \mathbb{R}

. Find the possible values of

k

. Find the range of

f(x)

in terms of

k