$\"\"$

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The function is $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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Quotient Rule of differentiation: $\"\"$ .

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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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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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Graph the functions $\"\"$ and $\"\"$ .

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$\"\"$

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The Zero of $\"\"$ corresponds to the point on the graph of the function where the tangent line is horizontal.

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$\"\"$

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$\"\"$ .

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Graph the functions $\"\"$ and $\"\"$ .

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$\"\"$

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The Zero of $\"\"$ corresponds to the point on the graph of the function where the tangent line is horizontal.