Tính S(n) = CanBac N(N + CanBac N – 1(N – 1 + … + CanBac3(3 + CanBac2(2))) có n – 1 dấu căn

#include<stdio.h>
#include<conio.h>
#include<math.h>
int main()
{
	int i, n;
	float S;
	do
	{
		printf("\nNhap n(n >= 2): ");
		scanf("%d", &n);

		if(n < 2)
		{
			printf("\nn phai >= 2. Xin nhap lai !");
		}
	}while(n < 2);
	i = 3;
	S = pow(2.0, 1.0/2);
	while(i <= n)
	{
		S = pow((i + S) * 1.0, 1.0/i);
		i++;
	}
	printf("\nTong la %f", S);

	getch();
	return 0;
}