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

using namespace std;

int main()
{
long double f,k_v,sag=10,f_konech,f_nach,i=0,r_ab=22.4,w,r_ekv=52.4;
 double l=137.7/pow(10,6),c=500/pow(10,12);
 //double l=137.7,c=500;
 
 cout<<"Vvedite f_nach=";
 cin>>f_nach;
 cout<<"\n\nVvedite f_konech=";
 cin>>f_konech;
 for(f=f_nach;f<=f_konech;f+=10)
 {
 //i++; 
 //f=f_nach;
 w=6.28*f;
 
 k_v=sqrt( (r_ab*r_ab) + (w*w*l*l) ) / sqrt( (r_ekv*r_ekv) + (w*l - 1/(w*c) )*(w*l - 1/(w*c) ) );
 cout<<"\nk_v["<<w<<"]="<<k_v;
  }
 //system&#40;"PAUSE"&#41;;
 return 0;
 }