${lim}_{x \to 1} \frac{x^{2} - 1}{x - 1}$

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Solution

${lim}_{x \to 1} \frac{x^{2} - 1}{x - 1} {lim}_{x \to 1} \frac{(x - 1) (x + 1)}{x - 1} {lim}_{x \to 1} x + 1 = 1 + 1 = 2$

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