How to solve a limit to infinity where the function is a fraction and the numerator is a square root? – math.stackexchange.com

So I have another question on limits. In this case the limit is: $$\lim_{x\to + \infty} \frac{\sqrt{x^2+4}}{x}$$ I tried to transform it into -> $\lim_{x\to + \infty} \frac{x^2+4}{x^2}$ because ...

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