## Algebra: A Combined Approach (4th Edition)

$\frac{4}{9}$
1. Since exponents cannot be negative when simplifying you take the reciprocal of both numbers giving you $\frac{1}{3^2}+\frac{1}{3}$ 2. Square the denominator of $\frac{1}{3^2}$ which will give you $\frac{1}{9}+\frac{1}{3}$ 3. Add the fractions which will give you an answer of $\frac{4}{9}$