You are Here: Home

# Core 4 intergration watch

1. Probably me being stupid but what's the best way to go about intergration

I thought it would be just

2. Integration by parts.

integral u.d/dv =uv - integral d/du.v ( . is multiplication).

take U as (lnx)^2
take V as X

Where did you get this question from?
Seems a bit hard for normal C4. Are you edexcel?
3. I think that you have to use the uv rule of integration because you can't integrate lnx directly. Then you have to use the lnx integration as v and place that in the formula. That's a really hard question though.
4. (Original post by ThatGuyRik)
Integration by parts.

integral u.d/dv =uv - integral d/du.v ( . is multiplication).

take U as (lnx)^2
take V as X

Where did you get this question from?
Seems a bit hard for normal C4. Are you edexcel?
(Original post by Maannashon)
I think that you have to use the uv rule of integration because you can't integrate lnx directly. Then you have to use the lnx integration as v and place that in the formula. That's a really hard question though.
Yeah I think it must be by parts, frustrating that I tried to take an easy route and it didn't work. It's an OCR question 9/9 so probably why it's quite tough.

5. (Original post by Substitution)
Yeah I think it must be by parts, frustrating that I tried to take an easy route and it didn't work. It's an OCR question 9/9 so probably why it's quite tough.

Ahh i see. Yeah its cause i'm doing edexcel, haven't really come across that question in either normal or solomon papers. I was just like what the.
6. by parts ftw

u = lnx

dv/dx = lnx

do they expect you to remember ∫ lnx ?
7. (Original post by the bear)
by parts ftw

u = lnx

dv/dx = lnx

do they expect you to remember ∫ lnx ?
integrating lnx has to be done by parts aswell rofl
8. Yeah though I wouldn't put it past edexcel to have a similar question in this year's paper (hope not).
9. (Original post by ThatGuyRik)
integrating lnx has to be done by parts aswell rofl
you get

xlnx -x

( + c )

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: May 11, 2015
Today on TSR

### University open days

• University of Roehampton
Sat, 17 Nov '18
• Edge Hill University
Faculty of Health and Social Care Undergraduate
Sat, 17 Nov '18
• Bournemouth University