public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        double a = 0;
        int i = 1;
        int x;
        double n;
        double f = 1;

        private void label2_Click(object sender, EventArgs e)
        {

        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void label3_Click(object sender, EventArgs e)
        {

        }
        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            x = Convert.ToInt32(Console.ReadLine());
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            n = Convert.ToDouble(Console.ReadLine());

        }

        private void label4_Click(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            double z = n;
            while (z > 1)
            {
                f *= z--;
            }
            bool test = false;
            do
            {
                a += (Math.Pow(x, i) / (f));
                i++;

                if (i == n)
                {
                    test = true;
                }

            }
            while (i < n);

            if (test)
            {
                textBox3.Text = ("" + this.a);
            }


        }

        private void textBox3_TextChanged(object sender, EventArgs e)
        {

        }

        private void label5_Click(object sender, EventArgs e)
        {