# Chapter R - Elementary Algebra Review - R.4 Polynomials - R.4 Exercise Set: 12

$x$

#### Work Step by Step

Using $\dfrac{1}{a^{-n}}=a^{n}$, the given expression, $\dfrac{1}{x^{-1}} ,$ simplifies to \begin{array}{l}\require{cancel} x^1 \\\\= x .\end{array}

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