Question

For every real number $x$, $x^3⩾0$.
Which of the following make this statement true?

• A. $x>0$
• B. $x⩾0$
• C. $x⩽0$
• D. $x<0$

Answer 1

The correct option is B $x⩾0$

If $x⩾0$ then $x^3⩾0$.
When $x$ is greater than 0, $x^3$ is greater than 0.
When $x$ is less than 0, $x^3$ is less than 0.
When $x$ is equal to 0, $x^3$ is equal to 0.