Question

1. Write a program in C++ that takes as inputs a positive integer n and a positive double a. The function should compute the geometric sum with base a up to the powern and stores the result as a protected variable. That is, the sum is: 1 + ? + ? ^2 + ? ^3 + ? ^4 + ⋯ + ? ^?

2.  Write a program in C++ that takes as input a positive integer n and computes the following productsum mix: 1 * (1+2) * (1+2+3) * (1+2+3+4)*…*(1+2+3+…+n) and stores the result as a protected variable.

Answer 1

#include
#include

using namespace std;

int main() {
   float a, n, i, term, sum;
   cout << "Enter a: ";
   cin >> a;
   cout << "Enter n: ";
   cin >> n;

   if (n > 0) {
      term = a;
      sum = 1;
      for (i = 1; i < n; i++) {
         sum += term;
         term = term + a;
      }
      cout << "Sum of geometric series: " << sum << endl;
   }

   system("pause");
   return 0;
}

=================================
#include
#include

using namespace std;

int main() {
   float a, n, i, term, p;
   cout << "Enter a: ";
   cin >> a;
   cout << "Enter n: ";
   cin >> n;

   if (n > 0) {
      term = 1;
      p = 1;
      for (i = 2; i < n; i++) {
         p *= term;
         term = term + i;
      }
      cout << "Product: " << p << endl;
   }

   system("pause");
   return 0;
}