#include <iostream>
using namespace std;
int main() {
double x, y, a, b, c, z; //43
cin >> x >> y >> a >> b >> c;
y = a*pow(x,2) + b*x + c;
if ( y > 0){
z = 1 / sqrt (a*pow(x,2) + b*x + c);
cout << z;
}
else{
cout << "net rechenuu"
}
return 0;
}
#include <iostream>
#include<cmath>
using namespace std;
int main()
{
double x,y, z; //15
cin >> x;
y = 12*pow(x,2) + 7 * x - 5;
if((sin (x) == 0)||(y == 0))
{
cout << "net rechenuu";
}
else {
z = 2 * cos (3*x)/sin (3*x) - 1/12*pow(x,2) + 7 * x - 5;
cout << z;
}
return 0;
}
#include <iostream>
#include<cmath>
using namespace std;
int main()
{
double R1, R2, z; //33
cin >> R1 >> R2;
if((R1 == 0)||(R2 == 0))
{
cout << "net rechenuu";
}
else {
z = 1/R1 + 1/R2;
cout << z;
}
return 0;
}
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
double x, y; //5
cin >> x >> y;
if(cos = 0){
cout << " net recheuu";
}
else{
z = 3 + pow (2.71, y - 1) / 1 + pow (x, 2) * abs( y - sin (x)/cos (x));
cout << z;
}
return 0;
}
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
double x, y, z; //23
cin >> x >> y;
z = pow(3,x) - 4*x +(y - sqrt(abs(x)));
cout << z;
return 0;
}