#include <iostream>
using namespace std;
int main()
{
int c;
cout <<"Проверить, как выбор пути решения влияет на результат:";
cin >> c;
switch ( c )
{
case 2: cout << "1/3+1/8+1/15+1/24+...+1/((n+1)^2-1)"; break;
case 3: cout << "(1+1/3)(1+1/8)(1+1/15)...(1+1/(n(n+2))"; break;
case 4: cout << "1/3+1/15+1/35+...+1/((2n-1)(2n+1))"; break;
case 5: cout << "(1-1/4)(1-1/9)(1-1/16)...(1-1/(n^2))"; break;
case 6: cout << "1-1/3-1/15-1/35-...-1/((2n-1)(2n+1))"; break;
case 7: cout << "1+2/2+3/4+4/8+5/16+///+n/(2^(n-1))"; break;
case 8: cout << "1+1/2+1/4+1/8+...+1/(2^n)"; break;
case 9: cout << "1-1/3+1/9-1/27+...+(-1/3)^n"; break;
case 10: cout << "1-1/2-1/4-1/8-...-1/(2^n))"; break;
case 11: cout << "1-1/3-1/8-1/15-...-1/((n+1)^2-1)"; break;
case 12: cout << "1+1/3+1/9+1/27+...+1/(3^n)"; break;
case 13: cout << "3/4+5/36+...+(2n+1)/((n(n+1))^2)"; break;
case 14: cout << "1/15+1/35+...+1/((2n+1)(2n+3))"; break;
case 15: cout << "1+3/2+7/4+15/8+...+(2^n-1)/2^(n-1)"; break;
default:
cout << "Обратитесь к автору проекта";
}
}
