You are Here: Home >< Maths

# Second Order Derivative Help watch

1. Stuck on this problem

(x^5+ 4x^4 -12x^3) / x+6

i basically divided them all by x
x^4 + 4x^3 -12x^2
and then by 6
1/6x^4 + 2/3x^3 -2x^2
i then did dy/dx
4/6x^3 +2x^2 -4x
then did d^2y/dx^2
2x^2 + 4x-4
2. (Original post by AsianG99)
Stuck on this problem

(x^5+ 4x^4 -12x^3) / x+6

i basically divided them all by x
x^4 + 4x^3 -12x^2
and then by 6
1/6x^4 + 2/3x^3 -2x^2
Are you saying that ... ?
3. (Original post by RDKGames)
Are you saying that ... ?
i guess
4. (Original post by AsianG99)
i guess
Well that's not how division works.

You should fully factorise the numerator and notice something before you do any differentiation.
5. What’s the actual question? Do you have to differentiate that fraction? Or just complete the division?
6. (Original post by Howie_2114)
What’s the actual question? Do you have to differentiate that fraction? Or just complete the division?
(Original post by RDKGames)
Well that's not how division works.

You should fully factorise the numerator and notice something before you do any differentiation.
find the second order derivative
i've worked it out now
thanks anyways

### Related university courses

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: February 15, 2018
Today on TSR

How do you think you'll do?

### University open days

Wed, 25 Jul '18
2. University of Buckingham
Wed, 25 Jul '18
3. Bournemouth University
Wed, 1 Aug '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams