C++ Program To Find Sum Of The Given Series 1+x^1+x^2+x^3+ . . . . x^n

#include<iostream>
#include<math.h>
using namespace std;
int main()
{

 long i,n,x,sum=1;

 cout<<"\n1+x+x^2+……+x^n";
 cout<<"\nEnter The Value Of X and n :\n";
 cin>>x>>n;

 for(i=1;i<=n;++i)
 {
  sum+=pow(x,i);
 }
 cout<<"\nSum = "<<sum<<endl;
 return 0;
}

Output:

1+x+x^2+……+x^n

Enter The Value Of X and n :

2

3

Sum = 15