# confusing area...............

Calculus Level pending

Let $$f(r)$$ denotes the number of integral points in a circle of radius r then evaluate $\lim _{ r\xrightarrow { } \infty }{ f(r)/\pi } r^ 2$

If your answer is in the form $$\frac{A}{B}$$ where $$A$$ and $$B$$ are positive integers, find $$A + B$$.

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