(a) The limit is  \"\\lim_{x\\rightarrow.

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Rewrite the limit as \"\\lim_{x\\rightarrow.

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If \"x\\rightarrow, then \"\\frac{1}{x}\\rightarrow.

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\"\\lim_{\\frac{1}{x}.

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Limit property:  \"\\lim_{\\theta\\rightarrow.

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\"\\lim_{\\frac{1}{x}