$\"\"$

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The curve is $\"\"$ and the interval is $\"\"$ .

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Definition of the surface area:

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If the curve $\"\"$ , $\"\"$ , then the surface area of the curve is defined as

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$\"\"$ .

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Consider $\"\"$ .

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Differentiate with respective to $\"\"$ .

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$\"\"$ \ \

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$\"\"$ .

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$\"\"$

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Surface area of the curve $\"\"$ :

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

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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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$\"\"$ .