Which of the following functions is continuous on the entire real number line ?

MATHEMATICS · Single correct · AP · Calculus AB · Limits and Continuity · Limits and Continuity

Problem

Which of the following functions is continuous on the entire real number line

(-\infty,\infty)

? (a)

f(x)=\sqrt{x+4}

(b)

f(x)=\ln x

(c)

f(x)=x^{3}-2x+5

(d)

f(x)=\dfrac{1}{x-2}