If $f(3)=1$ and $f(2x)=2f(x)$ for all $x$, find $f^{-1}(64)$.
Question:
If $f(3)=1$ and $f(2x)=2f(x)$ for all $x$, find $f^{-1}(64)$.
Answer:
Let's think step by step.

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If $f(3)=1$ and $f(2x)=2f(x)$ for all $x$, find $f^{-1}(64)$.
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