РЕШАТЬ

#include <iostream>
#include <cmath>
using namespace std;
int main()
{float n;
float x,p=1,b;
cout<<"x=";cin>>x;
cout<<"n=";cin>>n;
b=1/x
for (int i=1;i<=n;i++)
{b*=x;p*=1+b/(pow (n,3)-1);}
cout<<"p="<<p<<endl;
system("pause");
return 0;
}