Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 5 - Exponents and Polynomials - Chapter 5 Review Problem Set: 58

Answer

$\dfrac{11}{18}$

Work Step by Step

Using $a^{-x}=\dfrac{1}{a^x}$, the given expression, $ 2^{-1}+3^{-2} ,$ simplifies to \begin{array}{l}\require{cancel} \dfrac{1}{2^1}+\dfrac{1}{3^2} \\\\= \dfrac{1}{2}+\dfrac{1}{9} \\\\= \dfrac{9}{18}+\dfrac{2}{18} \\\\= \dfrac{11}{18} .\end{array}
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.