$\"\"$

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The function is $\"\"$ .

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Find $\"\"$ at $\"\"$ and $\"\"$ .

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$\"\"$

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

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$\"\"$

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Power rule of derivatives : $\"\"$ .

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$\"\"$

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The differentiate function is $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in differential function.

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$\"\"$

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$\"\"$

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Hence, the value of $\"\"$ is $\"\"$ .

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$\"\"$

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Find $\"\"$ at $\"\"$ and $\"\"$ .

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If $\"\"$ changes by a small amount $\"\"$ this will cause $\"\"$ to change by a small amount $\"\"$ .

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$\"\"$

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$\"\"$

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Substitute $\"\"$ and $\"\"$ in the $\"\"$ function.

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$\"\"$

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$\"\"$ .

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Hence, the value of $\"\"$ is $\"\"$ .

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$\"\"$

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The value of $\"\"$ is $\"\"$ .

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The value of $\"\"$ is $\"\"$ .