Question

Ajutatima va rog !! Am nevoe urgent dau funda!!!

Answer 1

#include <iostream>
using namespace std;

int rec(int i, int n){
if (i<n) return i*2 * rec(i+1, n);
else return i*2;
}
int main(){
int n, s=0, p=0;
cin>>n;
// nerecursiva
for (int i=1; i<=n; i++) s = s + 2*i;
cout<< s << endl;
// recursiva 
p = rec(1,n);
cout << p;   
return 0;}