$\"\"$

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The function is $\"\"$ .

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Find $\"\"$ .

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Substitute $\"\"$ in the function.

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$\"\"$

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Find $\"\"$ .

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Substitute $\"\"$ in the function.

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$\"\"$

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$\"\"$

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Definition of derivative : $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ , $\"\"$ and $\"\"$ .