# Chapter 7 - Exponents and Exponential Functions - Chapter Review - 7-1 Zero and Negative Exponents: 7

$\frac{1}{49}$

#### Work Step by Step

The negative exponent rule states that for every nonzero number $a$ and integer $n$, $a^{-n}=\frac{1}{a^n}$ We use this rule to rewrite the given expression as $\frac{1}{7^2}$. We expand the exponent on the denominator: $\frac{1}{7\times7}=\frac{1}{49}$

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