$\"\"$ .

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If we substitute 0 for delta x then the Function changes to 0/0 format.

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Apply L - Hospital Rule.

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$\"\"$

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$\"\"$

\

$\"\"$

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$\"\"$

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Apply limits to the function.

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$\"\"$

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$\"\"$

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$\"\"$ .

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Therefore, $\"\"$ $\"\"$ .

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.

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\