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- #include<stdio.h>
- #include<math.h>
- int main()
- {
- // Tinh tong so mu.
- int a, n;
- printf("Chuong trinh tinh tong. \nNhap vao so a:"); scanf("%d",&a);
- printf("Nhap vao so n: "); scanf("%d",&n);
- int an1 = pow(a,n+1);
- int s = (an1-a)/(a-1);
- printf("Tong bang: %d", s);
- return 0;
- }
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