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 - Concept Byte - Page 447: 6

Answer

$a.$ Conjecture: (the cube root of a number) = ($\displaystyle \frac{1}{3}$ power of a number) $b.$ Our conjecture works on $8$ and $27.$

Work Step by Step

$a.$ Generalizing on the pattern we observed in exercises 1-5: (the square root of a number) = ($\displaystyle \frac{1}{2}$ power of a number), We hypothesize that: (the cube root of a number) = ($\displaystyle \frac{1}{3}$ power of a number) $b.$ We know that $2^{3}=8$, so $\sqrt[3]{8}=2$ The calculator returns $8^{\wedge}(1\div 3)=2$ as well. We know that $3^{3}=27$, so $\sqrt[3]{27}=3$ The calculator returns $27^{\wedge}(1\div 3)=3$ as well So, our conjecture works for $8$ and $27.$
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