$\"\"$

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Find $\"\"$ .

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The function is $\"\"$ .

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Substitute $\"\"$ in above function. \ \

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$\"\"$

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$\"\"$

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$\"\"$ . $\"\"$

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Consider $\"\"$ .

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Substitute $\"\"$ in above function.

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$\"\"$

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$\"\"$ .

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$\"\"$

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The difference quotient is $\"\"$ .

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Substitute corresponding values in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ . $\"\"$

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The difference quotient is $\"\"$ .