$\"\"$

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The limit expression is $\"\"$ .

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$\"\"$

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$\"\"$

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As $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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By squeeze theorem: $\"\"$ .

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$\"\"$

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Therefore, $\"\"$ .

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$\"\"$

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Graph:

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Graph the function $\"\"$ .

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$\"\"$

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Observe the graph:

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$\"\"$ .

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$\"\"$

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$\"\"$ .