$\"\"$

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The function is $\"\"$ and the point is $\"\"$ .

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$\"\"$

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

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$\"\"$

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$\"\"$

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$\"\"$

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Apply power rule of differentiation: $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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Since the denominator of the function is zero, the derivative of the function at $\"\"$ does not exist. $\"\"$

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Graph :

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Graph the function $\"\"$ .

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$\"\"$

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Observe the graph:

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The derivative function of $\"\"$ at $\"\"$ does not exist.

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$\"\"$

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$\"\"$ .

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The derivative function of $\"\"$ at $\"\"$ does not exist.