Answer
$\frac{4}{9}$
Work Step by Step
$3^{-2}+3^{-1}=\frac{1}{3^2}+\frac{1}{3^1}=\frac{1}{9}+\frac{1\times3}{3\times3}=\frac{1}{9}+\frac{3}{9}=\frac{4}{9}$
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