Hello everyone, i'm suppose to find the length of the curve. But the book got a different answer, anyone see my problem? Here is the picture and my work:(adsbygoogle = window.adsbygoogle || []).push({});

http://img216.imageshack.us/img216/7900/urnt8jd.jpg [Broken]

THanks.

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# Finding length of the curve, did i mess up simpifying?

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