source code:
#include<iostream> #include<conio.h> #include<iomanip> #include<math.h> using namespace std; int main() { int x,n,i=0; long int sum=0; cout<<"Enter base and power : "; cin>>x>>n;cout<<endl; for(i=1;i<=n;i++) { sum=sum+(pow(x,i)); } cout<<sum; getch(); return 0; }