$\"\"$

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(a)

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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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$\"\"$

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Power rule of the derivative: $\"\"$ .

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$\"\"$

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Product rule of the derivative : $\"\"$ .

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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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(b)

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The function is $\"\"$ .

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Apply derivative with respect to $\"\"$ .

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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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(a) Derivative with respect to $\"\"$ is $\"\"$ .

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(b)Derivative with respect to $\"\"$ is $\"\"$ .