Код на с++ с вычислением у и х

 #include <iostream> 
#include <iomanip> 
#include <cmath> 
#include <array> 
 
inline double exactDerivative(double x) { 
    double x2 = x * x; 
    return (2 * (x2 - 1) - 2 * x * (1 + 2 * x)) / std::pow((x2 - 1), 2); 
} 
 
inline double function(double x) { 
    return (1 + 2 * x) / (x * x - 1); 
} 
 
int main() { 
    double x; 
    std::cout << "Введите значение X: "; 
    std::cin >> x; 
 
    const std::array<double, 4> dxValues = {0.0001, 0.001, 0.01, 0.1}; 
    double exact = exactDerivative(x); 
 
    std::cout << std::setw(10) << "DX"  
              << std::setw(20) << "DY/DX"  
              << std::setw(20) << "Exact"  
              << std::setw(20) << "Error" << '\n'; 
 
    for (const double& dx : dxValues) { 
        double dy = function(x + dx) - function(x); 
        double approxDerivative = dy / dx; 
        double error = std::abs(exact - approxDerivative); 
 
        std::cout << std::setw(10) << dx  
                  << std::setw(20) << approxDerivative  
                  << std::setw(20) << exact  
                  << std::setw(20) << error << '\n'; 
    } 
 
    return 0; 
}