Step 1:

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The expression is $\"\"$ .

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Rewrite the expression is $\"\"$ .

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formula for $\"\"$ .

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The above expression is in the form of $\"\"$ .

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The function is $\"\"$ .

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$\"\"$ and $\"\"$ .

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The total differential is $\"\"$ .

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

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$\"\"$

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

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$\"\"$

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$\"\"$ .

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$\"\"$

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

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Substitute $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Solution:

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$\"\"$ .

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