You are Here: Home >< Maths

# Quick Coursework Question watch

1. Does anyone know an equation that can be used in the Newton-Raphson method for C3 coursework??

For all the ones I could find, my calculator and Excel did not display enough figures to get an accurate answer.

The equation must include at least x³ and have non-integer roots.

Thank you!
2. Sorry, I don't understand the question. What does the coursework involve?

As I understand, the Newton-Raphson method gives a series of approximations in the form .
3. Sorry, it was a bit confusing.

Basically, we have to take an equation and find the three roots - where y=0.

In the Newton-Raphson, you put an estimate for the root into the equation you gave above. The answer is put into the equation again and so on.

I just want an equation to start with as some take longer than other to find an accurate root, and with the equations I tried, my calculator does not show enough digits for the method to work.
4. I'm not understanding the problem. You just want us to give you a cubic equation to solve?
5. Not exactly... I don't think I can explain properly if you haven't done this coursework. I might try at school to find someone who did it last year. Thanks for trying, anyway.
6. Well, you could try explaining it to me the way your teacher explained it to you.
7. Most cubics will work for this.

I assume you're using the ANS button on your calculator to make things easier.

Post the equation you're trying to use and we can have a look where things are going wrong.

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: July 9, 2007
Today on TSR

### TSR Pub Quiz 2018 - Anime

The first of our week-long series of entertainment quizzes

### University open days

Wed, 21 Nov '18
• Buckinghamshire New University
Wed, 21 Nov '18
• Heriot-Watt University
Wed, 21 Nov '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