You are Here: Home

# Is there such a thing a literaly integrating ln x? Tweet

Maths and statistics discussion, revision, exam and homework help.

Announcements Posted on
TSR launches Learn Together! - Our new subscription to help improve your learning 16-05-2013
IMPORTANT: You must wait until midnight (morning exams)/4.30AM (afternoon exams) to discuss Edexcel exams and until 1pm/6pm the following day for STEP and IB exams. Please read before posting, including for rules for practical and oral exams. 28-04-2013
1. Is there such a thing a literaly integrating ln x?
Hi there

Is there such a thing a literaly integrating ln x?
2. Re: Is there such a thing a literaly integrating ln x?
Yes, it is .

You can find it using integration by parts.
3. Re: Is there such a thing a literaly integrating ln x?
Yup. choose, as JB says, parts, using Ln(x) = Ln(x) x (1) - derive the Log part, integrate 1 for the other
4. Re: Is there such a thing a literaly integrating ln x?
How do you figuratively integrate a function?
5. Re: Is there such a thing a literaly integrating ln x?
(Original post by jackie11)
Hi there

Is there such a thing a literaly integrating ln x?
I'm gonna take a guess and say you've got a C3 exam 2morrow.
You should avoid integrating Ln X, that's why in integration by parts you make u=Ln x no matter what that way you only have to differentiate it and not integrate it.
This method works because i tried it with a question and came out with the right answer.
6. Re: Is there such a thing a literaly integrating ln x?
Here is an example from my book:

7. Re: Is there such a thing a literaly integrating ln x?
(Original post by EEngWillow)
How do you figuratively integrate a function?
Eh?

NO!
Last edited by Hasufel; 30-05-2012 at 19:42.
8. Re: Is there such a thing a literaly integrating ln x?
(Original post by Hasufel)
Eh?

NO!
well your question said "literally" and dont really know what you mean by using that word in this context?
9. Re: Is there such a thing a literaly integrating ln x?
xln(x) - x + c
10. Re: Is there such a thing a literaly integrating ln x?
It could be a misspelling of "illiterately".
11. Re: Is there such a thing a literaly integrating ln x?
On a more serious note - the posters who gave the answer are correct, but you should try it yourself. Integrate by parts, using the trick . It may seem weird, but it works.