Answer
True.
$2f(v)=f(v^2)$
Due to the One-to-One Property, if $2f(v)=f(v^2)=f(u)$ we must have that $v^2=u$
Work Step by Step
Using the Power Property:
$2f(v)=2\ln v=\ln v^2=f(v^2)$
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