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April 17, 2014

Homework Help: calculus

Posted by Arc Length on Sunday, August 24, 2008 at 9:11pm.

Find the length of the arc formed by
y = (1/8)(4x^2-2ln(x)) from x=4 to x=8.

I found the derivative of the function and got y'= x-(1/4x)

Where I'm lost now is after plugging it into the arc length equation: integral of sqrt(1+(x-(1/4x))^2). Squaring the derivative yields me sqrt(1+x^2+1/16x-1/2). Help please.

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