With the help of technology I've figured out that r=27 but I can't quite work it out.
I know 2^3log4(3)=2^log4(27 or 2^(log27)/(log4) and sqrt(r)=r^(1/2) but I can't quite put it all together....
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First notice that
Take the log of both
The left side is: .
Since . . we have: .
The equation becomes: .
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