4 For each of the following, determine the limit. (a) $\lim_{x \to 1^{-}} \frac{x + 1}{x^2 - 1}$ (c) $\lim_{x \to \pi^{+}} \frac{1}{\sin x}$
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To find the limit as x approaches 1 of (x^2 - 1), we can simply substitute 1 into the expression: lim(x->1) (x^2 - 1) = (1^2 - 1) = 0 b) Show more…
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