Elementary Algebra

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

Chapter 11 - Additional Topics - 11.3 - Fractional Exponents - Concept Quiz 11.3 - Page 489: 7

Answer

True

Work Step by Step

The definition of rational exponents states that $x^\frac{m}{n}=\sqrt[n] {x^m}$. We use this to rewrite each of the radicals in rational exponent form: $\frac{7^\frac{1}{2}}{7^\frac{1}{3}}=7^\frac{1}{6}$ To divide powers with the same base, we subtract the exponents. We use this rule to simplify the left side of the equation: $7^{\frac{1}{2}-\frac{1}{3}}=7^{\frac{1}{6}}$ Since $7^{\frac{1}{6}}=7^{\frac{1}{6}}$, the expressions are equivalent.
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