#include<stdio.h>
#include<math.h>

void main()
{
    float i,x,n,sum=1,temp;
    printf("\n x=? & n = ?\n");
    scanf("%f %f",&x,&n);
    for(i=1;i<=n;i++){
        temp = pow(x,i);
        sum=sum+temp;
    }
    printf("Sum = %f\n",sum);
}