Question:
$\operatorname{Mark}(\checkmark)$ against the correct answer
The value of $\left(\frac{3}{4}\right)^{-3}$ is
(a) $\frac{-27}{64}$
(b) $\frac{64}{27}$
(c) $\frac{-9}{4}$
(d) $\frac{27}{64}$
Solution:
(b) $\frac{64}{27}$
$\left(\frac{3}{4}\right)^{-3}=\left(\frac{4}{3}\right)^{3}=\frac{4^{3}}{3^{3}}=\frac{64}{27}$