Hello everyone while I was studying integrals i came across with a question I could not think how to act. Here it is How to solve this step by step? Thanks

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- Apr 28th 2010, 02:01 PMJohnDoeIntegrate
Hello everyone while I was studying integrals i came across with a question I could not think how to act. Here it is How to solve this step by step? Thanks

- Apr 28th 2010, 02:03 PMmaddas
Substitute and then use integration by parts.

- Apr 28th 2010, 02:08 PMJohnDoe
I am not very familiar with integrating (high school student) and this is a multiple choice(you can take the derivative of the answers) question how can I integrate partially?

- Apr 28th 2010, 02:40 PMNoobzUseRezIntegration by parts
Integration by parts is the reverse of the product rule. Consider . To integrate by parts we need to follow the form: . So let and . Integrating and differentiating gets us and . So now plug in the parts, thus making with the answer being .

Follow the substitution Maddas suggested, and integrate! - Apr 28th 2010, 02:51 PMJohnDoe
I have integrated and found the solution but do I wonder if I have to substitute lnx with u by instict what if it was an another function? Thanks for your help BTW