using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

double x = 4;

double y = 1;

double paso = .01;

double k1, k2, k3, k4;

​

while (x < 12)

{

    k1 = (4 * x - 2 * y) / 3;

​

    k2 = (4 * (x + (0.5 * paso)) - 2 * (y + k1 * 0.5 * paso)) / 3;

​

    k3 = (4 * (x + (0.5 * paso)) - 2 * (y + k2 * 0.5 * paso)) / 3;

​

    k4 = (4 * (x + paso) - 2 * (y + k3 * paso)) / 3;

​

    y = y + ((k1 + 2 * k2 + 2 * k3 + k4) / 6) * paso;

    x = x + paso;

    Console.WriteLine(x);

}

Console.WriteLine("El valor de y (f(x)) cuando x es " + x + " es " + y);

    }

}