Question

If $8=\frac{1}{\frac{1}{x^3}}$, then find the value of $x$.

• A. $-2.00$
• B. $-0.50$
• C. $0.50$
• D. $1.25$
• E. $2.00$

Answer 1

The correct option is E $2.00$

Given, $8=\frac{1}{\frac{1}{x^3}}$
$\therefore \frac{1}{x^3}=\frac{1}{8}$
$\therefore x^3=8$

Taking cube root on both the sides, we get

$\therefore x=2$