Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 7 - Exponents and Exponential Functions - 7-1 Zero and Negative Exponents - Lesson Check: 7

Answer

The negative exponent shows repeated division.

Work Step by Step

For example if y=400$\times$$20^{x}$ If x=-2 y=400$\times$$20^{x}$ = 400$\times$$20^{-2}$ = $\frac{400}{20^{2}}$ = $\frac{400}{20\times20}$ = $\frac{20}{20}$ = 1
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