# Chapter 4 - Polynomials - 4.1 Exponents and Their Properties - 4.1 Exercise Set - Page 237: 104

$\dfrac{a+7}{7}$

#### Work Step by Step

If $a=2$, then the expression $\dfrac{a+7}{7}$ evaluates to \begin{array}{l}\require{cancel} \dfrac{2+7}{7} \\\\= \dfrac{9}{7} .\end{array} Hence, $a \ne \dfrac{a+7}{7}$.

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