$\"\"$

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The limit function is $\"\"$ .

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Let $\"\"$ and $\"\"$ .

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Therefore, $\"\"$ .

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As $\"\"$ , $\"\"$ approaches to $\"\"$ .

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$\"\"$ .

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The above limit is in indeterminate form $\"\"$ , hence apply L $\"\"$ Hospital $\"\"$ s rule.

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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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Graph:

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Graph the function $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .