#### Answer

$2$

#### Work Step by Step

RECALL:
$\sqrt[n]{a} = a^{1/n}$
Use the rule above by to obtain:
$\sqrt[7]{128} = 128^{1/7}$
Since $128=2^7$, then
$\color{blue}{128^{1/7} = 2}$

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$2$

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