code01

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

using namespace std;

int main()
{
    double x=-.5;
    double sum1=0;
    double sum2=0;
    double mn1=0;
    double mn2=0;
    mn1=(1+x)/(1-x);
    cout<<mn1<<endl;
    cout<<endl;
    sum1=log(mn1);
    for (int k=1;k<=100;k++){
        mn2=k*2-1;
        //cout<<mn<<",";
        sum2+=pow(x,mn2)/mn2;


    }
    cout<<endl;
    cout<<sum1<<endl;
    cout<<sum2*2<<endl;
    return 0;
}