№6

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

void main()
{
   int n,x;
   float sum;
   sum = 0;
   printf("Vvedite cherez probel n & x ");
    scanf("%i%i",&n,&x);
   for (int k = 1; k <= n; ++k)
    sum = sum + ((pow(-1,k)*pow(x,k))/(pow(2*k+1,k)));
   printf("%f",sum);
   getch();
}