Work Step by Step
We are asked to find $(g∘g)(1)$. We know that $(g∘g)(x)=g(g(x))$. Therefore, $(g∘g)(1)=g(g(1))$. From the first table, we see that $g(1)=9$. From the first table, we see that $g(9)=12$. Therefore, $g(g(1))=g(9)=12$.
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