#include<stdio.h>
#include<stdlib.h>
#include<math.h>
double sum(int n)
{
double s;
s = (double)pow(-1,n-1) * pow(2,n);
s /= (double)(pow(2,n) + pow(-1 , n));
s /= (double)(pow(2,n+1) + pow(-1 , n+1));
return s;
}
int main()
{
int n,i=0;
double s;
scanf("%d",&n);
for(i=1;i<=n;i++){
s += sum(i);
}
printf("%.6lf",s);
return 0;
}
级数和
猜你喜欢
转载自blog.csdn.net/young_Tao/article/details/78116681
今日推荐
周排行