Question

What is the value of $5^{-3}$?

Answer 1

Find the value of $5^{-3}$.

$\begin{array}{rcl}{5}^{-3}& =& \frac{1}{5^3}\left\{\because a^{-m}=\frac{1}{a^m}\right\}\\ & \Rightarrow & 5^{-3}=\frac{1}{125}\end{array}$

Hence, value of $5^{-3}$ is $\frac{1}{125}$.