# GRE Question of the Day (June 11th)

- Jun 11, 02:00 AM Comments [0]

## Quant

Which of the following functions has as its domain the set of all real numbers?

Indicate all that apply.

A. $${f(x)=\frac{{4}}{{x+4}}}$$

B. $${ f(x)=\frac{{4}}{{x^2+1}}}$$

C. $${f(x)=[square_root]4x^3[/square_root]}$$

D. $${f(x)=[square_root](-4x)^2[/square_root]}$$

E. $${f(x)=\sqrt[3]{4x}}$$

Correct Answer - B, D, & E  - (click and drag your mouse to see the answer)

Question Discussion & Explanation