Chapter 4.2, Problem 7GP

To determine

To write each expression using a positive exponent.

Answer to Problem 7GP

The expression value is ${\text{3}}^{-2}$ .

Explanation of Solution

Given information: Given expression is $\frac{1}{9}.$

Calculation:

From the given:

  $\begin{array}{l}\frac{1}{9}\\ =\frac{1}{3^2}\\ ={\text{3}}^{-2}\text{ Defination of exponent, }{a}^{-n}=\frac{1}{a^n}\end{array}$

Thus, the expression value is ${\text{3}}^{-2}$ .