Question

calculati in c++ x-x^3/3!+x^5/5!-...+(-1)^n*(x^(2n+1))/(2n+1)!

Answer 1

Prima data citeste x,apoi n.

#include <iostream>

#include <cmath>

using namespace std;

long long factorial(int n)

{

   long long p=1;

   int i;

   for(i=1;i<=n;i++)

    p=p*i;

   return p;

}

int main()

{

   double x,s=0.0;

   int n,i;

   cin>>x>>n;

   for(i=0;i<=n;i++)

     if(i%2==0)

        s+=(double)pow(x,2*i+1)/factorial(2*i+1);

     else

        s-=(double)pow(x,2*i+1)/factorial(2*i+1);

   cout<<s;

   return 0;

}

Answer 2

#include <bits/stdc++.h>

using namespace std;

double factorial (int h)

{

   if (h == 1 || h == 0) return 1;

   return h * factorial (h-1);

}

int main()

{

   double x, n, s = 0;

   cin >> x >> n;

   for (int i = 1; i < n; i++)

   {

       s = s + factorial(pow(x , (2*i+1)/(2*i+1)));

   }

   cout << s;

   /*Nu am inteles perfect formula dar s-ar putea sa trebuiasca s = s + (-1*pow( x, factorial(pow(x , (2*i+1)/(2*i+1)))))

*/

   return 0;

}