Bài 6: Tính S(n) = 1/1x2 + 1/2x3 + + 1/n x (n + 1) #include #include int main() { int i, n; float S; S = 0; i = 1; { printf("\nNhap n: "); scanf("%d", &n); if(n < 1) { printf("\nN phai lon hon hoac bang Xin nhap lai !"); } }while(n < 1); while(i