Chapter 14.7, Problem 4WE

To determine

To find : the value of the following.

Answer to Problem 4WE

The value of ${\left(5^{-1}\right)}^{-1}$ is $5$ .

Explanation of Solution

Given information : The expression is ${\left(5^{-1}\right)}^{-1}$ .

Calculation :

  $\begin{array}{l}{\left(a^{-1}\right)}^{-1}=\frac{1}{a^{-1}}\\ \frac{1}{a^{-1}}=a\\ {\left(5^{-1}\right)}^{-1}=\frac{1}{5^{-1}}\\ \frac{1}{5^{-1}}=5\end{array}$