Consider defined on

MATHEMATICS · Single correct · AP · Calculus AB · Analytical Applications of Differentiation · Analytical Applications of Differentiation

Problem

Consider

f(x)=k x^{2}+4x+7

defined on

[0,\infty)

. For which of the following sets of

k

f

strictly increasing on

[0,\infty)

? (a)

k>0

(b)

k>-2

(c)

k\ge 0

(d)

k\le 0