Let f :R to [0,oo) be such that lim(xto3...

Let `f :R to [0,oo)` be such that `lim_(xto3)`f(x) exists and `lim_(x to 3) ((f(x))^2-4)/sqrt(|x-3|)=0`. Then `lim_(x to 3) f(x)` equals

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