שב3 שאלה 5

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

double Pow(double a, int b) {
	double sum = a;
	for (int i = 1; i < b; i++) {
		sum = a * sum;
	}
	return sum;
}

int main() {
	double a1, q, a, b, Sn;
	int n;
	printf("Enter your first term (a1):\n");
	scanf_s("%lf", &a1);
	printf("Enter your share (q):\n");
	scanf_s("%lf", &q);
	printf("Enter your number of terms (n):\n");
	scanf_s("%d",&n);
	a = Pow(q, n) - 1;
	b = q - 1;
	Sn = a1 * (a / b);
	printf("%lf", Sn);
}

//          q^n -1
//	Sn = a1 -----
//		    q - 1