public static void Main()
Console.WriteLine("Tính S(n) = CanBac2(x^n + CanBac2(x^n-1 + … + CanBac2(x^2 + CanBac2(x)))) có n dấu căn");
Console.WriteLine("Nhap vao so x:");
double x = int.Parse(Console.ReadLine());
Console.WriteLine("Nhap vao so n:");
double n = int.Parse(Console.ReadLine());
{ s=Math.Sqrt(s+Math.Pow(x,i));
Console.WriteLine("Ket qua la:{0}",s);