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Question
question suppose $h(x)=f(g(x))$. given the table of values below, determine $h(2)$.
| $x$ | $f(x)$ | $g(x)$ | $f(x)$ | $g(x)$ |
|---|---|---|---|---|
| $3$ | $-1$ | $6$ | $5$ | $-4$ |
| $5$ | $-4$ | $-5$ | $2$ | $-2$ |
do not include \$h(2)=$\ in your answer. provide your answer below:
Step1: Apply chain - rule
The chain - rule states that if $h(x)=f(g(x))$, then $h^{\prime}(x)=f^{\prime}(g(x))\cdot g^{\prime}(x)$.
Step2: Evaluate at $x = 2$
When $x = 2$, we first find $g(2)=3$ from the table. Then we find $f^{\prime}(g(2))=f^{\prime}(3)$ and $g^{\prime}(2)$. From the table, $f^{\prime}(3) = 5$ and $g^{\prime}(2)=5$.
Step3: Calculate $h^{\prime}(2)$
$h^{\prime}(2)=f^{\prime}(g(2))\cdot g^{\prime}(2)=5\times5 = 25$.
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