Answer
False
Work Step by Step
By the Power Rule: $\quad \log_{b}(M^{p})=p\cdot\log_{b}\mathrm{M}$
It follows that:
$\log_{4}(2x)^{3}=3\log_{4}(2x)$
In our case, the power is only on the $x$ term, so the statement is False.
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