\"\"

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The function is \"\".

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Substitute \"\" for \"\".

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\"\".

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Difference quotient of \"\" \"\".

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Substitute the values of \"\" and \"\" in \"\".

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\"\"\"\"

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Rationalize the numerator.

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Multiply the numerator and denominator by conjugate of the numerator.

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\"\"

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\"\"

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Difference quotient of \"\" is \"\".