Code:
#include stdio.h
#include math.h
int main()
{
float a, r, i, last_term, sum = 0;
int n;
printf("Enter the first term of the G.P. series: ");
scanf("%f", &a);
printf("Enter the total numbers in the G.P. series: ");
scanf("%d", &n);
printf("Enter the common ratio of G.P. series: ");
scanf("%f", &r);
sum = (a *(1 - pow(r, n + 1))) / (1 - r);
last_term = a * pow(r, n - 1);
printf("last_term term of G.P.: %f", last_term);
printf("\n Sum of the G.P.: %f", sum);
return 0;
}
Output:
Enter the first term of the G.P. series: 3
Enter the total numbers in the G.P. series: 7
Enter the common ratio of G.P. series: 2
last_term term of G.P.: 192.000000
Sum of the G.P.: 765.000000
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