using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static double func(double x)
        {
            return 1 - x + Math.Sin(x) - Math.Log(1 + x);
        }

        static double sfunc(double x)
        {
            return -1 / (x + 1) + Math.Cos(x) - 1;
        }

        static void Main(string[] args)
        {
            double a = 0, b = 1.5;
            double eps = 0.0001;

            double x1 = 0, x2 = x1 - func(x1) / sfunc(x1);

            while (Math.Abs(x2 - x1) > (Math.Sqrt(eps) / 10))
            {
                x1 = x2;
                x2 = x1 - func(x1) / sfunc(x1);
            }

            double answer = x2;

            Console.WriteLine("{0:f4}",answer);
            Console.ReadKey();
        }
    }
}