# Appendix B - Exercise Set - Page 742: 65

$\frac{a^8}{b^8}$

#### Work Step by Step

Use the product rule and the definition of negative exponents. $(a^{-2}b^3)(a^{10}b^{-11})=a^{-2+10}b^{3+(-11)}=a^8b^{-8}=\frac{a^8}{b^8}$

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