# Appendix B - Exercise Set - Page 742: 28

$\frac{1}{x^3}$

#### Work Step by Step

$\frac{x^{-4}}{x{-1}}=x^{-4-(-1)}=x^{-4+1}=x^{-3}=\frac{1}{x^3}$ Use the quotient rule to simplify.

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