Suppose \displaystyle \lim_{x \to 4} \frac{f(x)}{x^2} = 1 .
Find the following limits.

(a)\displaystyle
\lim_{x \to 4} f(x) =
.

(b)\displaystyle
\lim_{x \to 4} \frac{\sqrt{x} f(x)}{x^2-3} =
.

(a)

(b)

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