Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.6 Rational Exponents - R.6 Exercises - Page 63: 48



Work Step by Step

RECALL: (1) $a^{1/n} = \sqrt[n]{a}$ (2) If $a \gt 0$, then $\sqrt[n]{a^n} = a$ Use rule (1) above to obtain: $121^{1/2} = \sqrt{121}$ Use rule (2) above to simplify and have: $\sqrt{121}=\sqrt{11^2}=\color{blue}{11}$
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