using System;

public class Program

{

    public static double Function(double p)

        {

            return ( 3*p*p-4);

        }

       public  static void Main(string[] args)

        {

            double a = 1; double b =7;

            int n =1000;

            double h = (b - a) / (n - 1);

            Console.WriteLine("трапеция адиси:");

            double s = 0;

         double   x= a + h;

​

            while (x < b)

            {

                s += 2 * Function(x);

                x+= h;

            }

            s = h / 2 * (s +Function(a) +Function(b));

            Console.WriteLine("интеграл жауабы {0}.", s);

            Console.ReadLine();

​

        }

}