Answer
$f(3)=\frac{1}{2}$
Work Step by Step
$f$ is continuous. This implies that
$\lim\limits_{x \to 3}f(x)=f(3)$
Given that $\lim\limits_{x \to 3}f(x)=\frac{1}{2}$
$\implies f(3)=\frac{1}{2}$
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