$\"\"$

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The function is $\"\"$ .

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The function is continuous on the entire real line.

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$\"\"$ .

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Find $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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The value of $\"\"$ is $\"\"$ .