I was watching DonnyLee's videos on youtube and I noticed something strange. I think he picked u=x and du=dx, and if I'm right (?) he picked v= [tex]\int x dy/dx[/tex] but does that even equal to y? But that can't be right because the right side kept the original expression. Some help might clear up the fuzziness(adsbygoogle = window.adsbygoogle || []).push({});

https://www.youtube.com/watch?v=<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/GAkkTa2XpEc&hl=en&fs=1"></param><param [Broken] name="allowFullScreen" value="true"></param><embed src="http://www.youtube.com/v/GAkkTa2XpEc&hl=en&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>

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# Strange Integral- Does it even exist?

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