Iteration using Newton Raphson's method

[John Morris]

This is the assignment >>----http://www.cs.fiu.edu/~smithjo/assignments_2xxx/assign2xxx5_a.docx


*****************

Here is my code

I tried to put some kind of equation but it loops infinitely...

public class TestNewton
{

    private static double x = 5;
    private static int n = 3;

    public static void main(String[] arg)
    {

        System.out.println("Number    Number Radical");
        System.out.println("--------------------------");

        while (x != 0 && x * (n + 1) - x * n >= 0.005)
        {
            double number; //Loop control variable
            double d = (x * x * x) - (11 * (x * x)) - ((6 * x) + 5);
            double d2 = d *5;

            for (number = 1; number <= 10; number++)
            {
                System.out.println(number + "\t\t" + d2);

                //x^3 - 11*x^2 - 6*x + 5
            }


        }

    }
}

Help please. It's due sunday, at least a pointer. a hint...anything >.<

[Tim Moores]

x starts out at 5.

The while loop checks whether x is larger than 0.005 (note that "x * (n + 1) - x * n" is identical to "x").

The value of x never changes.

[John Morris]

But that doesn't show me how to form the equation. I'm still completely lost :/

I have to make it stop when it's equal to 0.005

and output all iterations.

[Tim Moores]

John Morris wrote:But that doesn't show me how to form the equation.

You asked for a hint, you got a hint. It's your homework - hints is all you'll get.

You will need two variables for x, let's say x0 and x1. x0 would be the value calculated in the previous iteration, and x1 the value calculated in the current iteration. You want the loop to stop when abs(x0-x1) < 0.005.

[Campbell Ritchie]

Welcome to the Ranch

We won’t show you how to form the equation, but will give hints or helps if you show an example with errors. You should write the algorithm on paper, then you can see what you have got to code.

[Mohamed Sanaulla]

... And as a tip- please UseCodeTags when you are posting some code. This time I have done it for you and see how good it looks