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So, im a little stuck on what to do next.. im trying to find the surface area of a revolution about the x-axis for the following:

 

\(y=x^2, [0, 4]\)

 

The derivative of x^2 is 2x...

 

so plugging in my values into the formula, im getting:

\(s=2pi\int_{0}^{4}x^2\sqrt{1+(2x)^2}dx\)

 

i'm actually not sure what the next step is? 

 
 Sep 26, 2016

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