Answer
$n^{8/9}$
Work Step by Step
Since $x^{-a}=\dfrac{1}{x^a}$, then,
\begin{align*}
\dfrac{1}{n^{-8/9}}
\\\\=
n^{8/9}
.\end{align*}
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.