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Calculus Level 1

Find the limit: lim x x x 2 1 \ \quad \lim_{ x \to \infty }{ \frac { x }{\sqrt{x^2 - 1} } }


The answer is 1.

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1 solution

João Cavalcante
Oct 18, 2015

We can substitute the (-1) in the denominator for (0), as it will not affect the final result (infinity minus one here equal infinity). By doing that, we have:

l i m x x x 2 = l i m x 1 lim_{x \to \infty}\frac{x}{\sqrt{x^2}}=lim_{x \to \infty} 1
Because the limit of a constant is that constant, the limit of 1 as x approaches infinity is equal to 1 \boxed{1} \square

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