Ok guys, this is my first post. Please go easy...(adsbygoogle = window.adsbygoogle || []).push({});

This question is from Morris Kline'sCalculus: An Intuitive and Physical Approachand unfortunately there aren't solutions for all questions (really annoying).

I'm not even sure if this counts as a contradiction but anyway:

Let us evaluate int.(1/x)dx by parts. If we let u=1/x and dv=1dx, we obtain int.(dx/x)=1 + int.(dx/x). Then 1=0. What is wrong?

I would really appreciate a simple explanation from any of you experienced brains out there! Thanks.

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# Integration by Parts Contradiction

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