Let $f$ and $g$ be twice differentiable functions on $R$ such that
$$
\begin{aligned}
& f^{\prime \prime}(x)=g^{\prime \prime}(x)+6 x \\
& f^{\prime}(1)=4 g^{\prime}(1)-3=9 \\
& f(2)=3 g(2)=12
\end{aligned}
$$
Then which of the following is NOT true?
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