You are Here: Home >< Maths

# Intergration by parts

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016

1. I have had a go at this question. I am trying to intergrate e^5y / 5 dy and I got e^5y / 25

Is this correct?
2. (Original post by ak1992)

I have had a go at this question. I am trying to intergrate e^5y / 5 dy and I got e^5y / 25

Is this correct?
No, you need to use IBP again on .

In general, to integrate w.r.t using IBP, you need to apply IBP times.
3. This is what I don't understand. To IBP again you would have to let one be U and the other be dv/dy.
Would you differentiate e^5y / 5 and intergrate the 2y?
4. (Original post by ak1992)
This is what I don't understand. To IBP again you would have to let one be U and the other be dv/dy.
Would you differentiate e^5y / 5 and intergrate the 2y?
No, you'd differentiate the 2y and integrate the e^5y.

5. Does this look about right?

(Original post by Zacken)
No, you'd differentiate the 2y and integrate the e^5y.
6. (Original post by ak1992)

Almost, it should be and not remember to distribute your negative signs. The rest is fine.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: April 13, 2016
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:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams