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#include<stdio.h> #include<conio.h> #include<math.h> int main() { int i, n; float S; do { printf("\nNhap n(n >= 1): "); scanf("%d", &n); if(n < 1) { printf("\nn phai >= 1. Xin nhap lai !"); } }while(n < 1); S = sqrt((float)2); for(i = 2; i <= n; i++) { S = sqrt(2 + S); } printf("\nTong S = %f", S); getch(); return 0; }
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