Answer
$g(f(0))=0$
Work Step by Step
First, find $f(0)$. Use $x=0$ in $f(x)$ to get $f(0)=3(0)-1=-1$. Now, use $f(0)$ in $g(x)$ to get $g(f(0))=g(-1)=1-(-1)^2=1-1=0$.
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